Description This is a simulation of a boat crossing a river. Adjust the direction the boat is aimed, the boat's velocity relative to the river, and the river's velocity relative to the earth. Press the "Run" button to watch the boat's trip across the river. Questions to answer: 1) What direction should the boat be aimed to get to the other side of the river in the least amount of time? 2) What direction does the boat need to be aimed to get to the point directly across the river? 3) If the boat is aimed directly across the river, does the speed of the river's current affect the amount of time it takes the boat to cross the river?

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riverboat physics classroom

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Riverboat Simulator

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Physics A and B - Lurie

Riverboat simulator ophysics - relative motion.

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Outdoor classroom rebuilt after Fiona becomes tribute to late teacher 

'we just love that we've created a legacy for her,' says colleague of linda roach.

riverboat physics classroom

Social Sharing

Kindergarten teacher Linda Roach was known for her love of the outdoors and for being active. 

When the outdoor classroom at Vernon River Consolidated School in eastern Prince Edward Island was destroyed by falling trees during post-tropical storm Fiona in 2022, Roach was determined to rebuild it.

She had helped to create the original classroom, so along with physical education teacher Sarah Adams, she put together a proposal and the school received provincial funding. 

"We really felt the loss of this classroom after Fiona had taken down lots of trees, and we weren't using this space," Adams said.  

A woman in running gear smiles

"Our kids love being outside. We've got kids who build forts. They climb trees. They live for the outdoors," Adams said. "We really wanted to create kind of a designated space that was purposeful, where teachers could take children outside to really engage in some hands-on experiential learning opportunities."

But Roach passed away in December 2023, before the project could be carried out, leaving colleagues, students and local families to mourn her loss. 

riverboat physics classroom

'Somewhere she would have loved to be': Outdoor classroom honours P.E.I. teacher's memory

"Trying to take it on, and keep her vision and my vision together without her here, has been quite difficult," Adams said. 

"But we've had so many people step up and support that. So I think she'd be proud."

Value of the outdoors

Six months after Roach's death, the school and the entire community have rallied to finish the outdoor classroom. 

And it has blossomed into an even bigger project, with a community garden, medicine wheel garden, and more. 

Two people sitting on a wooden bench sharing a laugh

"Our project really kind of took on a new life. A lot of people from the community... were reaching out, wanting to help out," said principal Dave Wood. "Our home and school [association] joined in. People from the community have joined in. We've gotten great support." 

He said being out in the fresh air was important to Roach, who had training as a hunter and trapper.

"She felt connecting with outside was really important — learning about the environment, learning about all the world around us," Wood said.

"It was kind of neat for a kindergarten teacher to really want to expose children to that. She wanted to get away from the screens and she wanted the kids to be outside and learning and playing."

A man with a rake stands in a garden with a group of students watching

Wood said the community garden is a new addition to the outdoor project, and one that the community is embracing.

"We're trying to bring the community back in after COVID, and the schools were shut down, and people didn't feel like they were welcome to come into the schools," Wood said.

"We're trying to open the doors, get people to feel welcome and build that trust, build that welcoming atmosphere."

Grieving and healing

As the school's only kindergarten teacher, Roach would have had nearly every student now at the school in her classroom, making her loss even more significant. 

That's why there is a bench in the outdoor classroom with her name on it. 

"I think it's gone a way toward some of the healing, and some of the grieving, and we just love that we've kind of created a legacy for her," Sarah Adams said. 

An outdoor space with stumps for seats and wood chips on the ground

"This provides a space for reflection, a place where they could think about their teacher that we all loved so much — maybe have a closer connection with her because they can come to this space, and they know that this is somewhere she would have loved to be," Adams said.

We want to remember her, and the wonderful life that she lived. She was a really great person. — Ali Kenny

The bench in particular provides "a chance to sit down and think about her and maybe help heal a little bit," she said.

Two girls holding small painted rocks

Students of all ages have been involved in creating the outdoor classroom, as well as making signs for trees and animals and planting the gardens. 

"I felt like it was going to be a really good project, and a great way to express ourselves, and just make a great space for other classes to enjoy," said Grade 6 student Lyric O'Brien.

Two boys using a drill in a wooden structure

"It is a way to express ourselves in the garden and we can help out the community by giving back," said Grade 6 student Ali Kenny. 

She also said the garden and classroom being in memory of the kindergarten teacher is special to everyone.

"We want to remember her, and the wonderful life that she lived. She was a really great person."

ABOUT THE AUTHOR

riverboat physics classroom

Nancy Russell is a reporter at CBC Prince Edward Island. She has also worked as a reporter and producer with CBC in Whitehorse, Winnipeg, and Toronto. She can be reached at [email protected]

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June 25, 2024

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South Sudan says its 6M antelope make up world's largest land mammal migration, but poaching on rise

by Sam Mednick

South Sudan says its 6M antelope make up world’s largest land mammal migration, but poaching on rise

Seen from the air, they ripple across the landscape—a river of antelope racing across the vast grasslands of South Sudan in what conservationists say is the world's largest land mammal migration.

The country's first comprehensive aerial wildlife survey, released Tuesday, found about 6 million antelope. The survey over a two-week period last year in two national parks and nearby areas relied on spotters in airplanes, nearly 60,000 photos and tracking more than a hundred collared animals over about 46,000 square miles (120,000 square kilometers).

The estimate from the nonprofit African Parks, which conducted the work along with the government, far surpasses other large migratory herds such as the estimated 1.36 million wildebeests surveyed last year in the Serengeti straddling Tanzania and Kenya. But they warned that the animals face a rising threat from commercial poaching in a nation rife with weapons and without strong law enforcement.

"Saving the last great migration of wildlife on the planet is an incredibly important thing," said Mike Fay, a conservation scientist who led the survey. "There's so much evidence that the world's ecosystems are collapsing, the world resources are being severely degraded and it's causing gigantic disruption on the planet."

The east African nation is still emerging from five years of fighting that erupted in 2013 and killed nearly 400,000 people. Elections scheduled for last year were postponed to this December, but few preparations are in place for those. Violence continues in some areas, with some 2 million people displaced and 9 million—75% of the population—reliant on humanitarian aid, according to the United Nations.

The migration is already being touted as a point of national pride by a country trying to move beyond its conflict-riddled past. Billboards of the migration recently went up in the capital of Juba, and the government has aspirations that the animals may someday be a magnet for tourists.

South Sudan says its 6M antelope make up world’s largest land mammal migration, but poaching on rise

South Sudan has six national parks and a dozen game reserves covering more than 13% of the terrain. The migration stretches from east of the Nile in Badingilo and Boma parks into neighboring Ethiopia—an area roughly the size of the U.S. state of Georgia. It includes four main antelope, the white-eared kob—of which there are some 5 million—the tiang, the Mongalla gazelle and bohor reedbuck.

The survey said some animals have increased since a more limited one in 2010. But it described a "catastrophic" decline of most non-migratory species in the last 40 years, such as the hippo, elephant and warthog. Associated Press journalists flying over the stunning migration of thousands of antelope last week saw few giraffes and no elephants, lions or cheetahs.

Trying to protect the animals over such a vast terrain is challenging.

In recent years, new roads have increased people's access to markets, contributing to poaching. Years of flooding have meant crop failures that have left some people with little choice but to hunt for food. Some 30,000 animals were being killed each month between March and May this year, African Parks estimated.

The government hasn't made a priority of protecting wildlife. Less than 1% of its budget is allocated to the wildlife ministry, which said it has few cars to move rangers around to protect animals. Those rangers say they haven't been paid a salary since October and are outgunned by poachers.

South Sudan President H.E. Salva Kiir Mayardit said the country is committed to turning its wealth of wildlife into sustainable tourism. He called on the Ministry of Wildlife to prioritize training and equipping rangers to fight poaching.

South Sudan says its 6M antelope make up world’s largest land mammal migration, but poaching on rise

Matthew Kauffman, an associate professor of zoology at the University of Wyoming who specializes in research into migration and ecosystems, said the work fits a growing global effort "to map these migrations." One benefit is to be smarter when landscapes are developed to make way for these seasonal movements, he said.

Villagers near the parks told AP they mostly hunted to feed their families or to barter for goods.

A newly paved road between Juba and Bor—the epicenter of the illegal commercial bushmeat trade—has made it easier for trucks to carry large quantities of animals. Bor sits along the Nile, about 27 miles (45 kilometers) from Badingilo Park. In the dry season, animals coming closer to the town to drink are vulnerable to killing.

Officials at the wildlife ministry in Bor told AP the killing of animals had doubled in the last two years.

Even when those involved in the industry are caught, the consequences can be minor. A few years ago, when wildlife rangers came to arrest Lina Garang for selling animals, she said they let her go, instead telling her to conduct business more discreetly. Garang, 38, said her competition has only grown, with 15 new shops opening along her strip to buy and sell animals.

Part of the challenge is that there is no national land management plan, so roads and infrastructure are built without initial discussions about where best placed. The government's also allocated an oil concession to a South African company in the middle of Badingilo that spans nearly 90% of the park.

South Sudan says its 6M antelope make up world’s largest land mammal migration, but poaching on rise

African Parks is trying to square modernizing the country with preserving the wildlife. The organization has been criticized in the past for not engaging enough with communities and taking an overly militarized approach in some of the nearly two dozen areas it manages in Africa.

The group says its strategy in South Sudan is focused on community relations and aligning the benefits of wildlife and economic development. One plan is to create land conservancies that local communities would manage, with input from national authorities.

African Parks has set up small hubs in several remote villages and is spreading messages of sustainable practices, such as not killing female or baby animals.

Peter Alberto, undersecretary for the ministry of wildlife, conservation and tourism, said the government hopes the migration can become a point of pride, and reshape how the world thinks of South Sudan.

As for tourism, that may take a while. There aren't hotels or roads to host people near the parks, and the only option is high-end trips for what one tour company official called a "high-risk" audience. There's fighting between tribes and attacks by gunmen in the area, and pilots told AP they've been shot at while flying.

Will Jones, chief exploration officer for Journeys by Design, a UK-based tour company, charges roughly $150,000 per person for a weeklong tour in South Sudan. He said there isn't strong demand.

South Sudan says its 6M antelope make up world’s largest land mammal migration, but poaching on rise

Locals trying to protect the wildlife say it's hard to shift people's mentality.

In the remote village of Otallo on the border with Ethiopia, young men have started buying motorbikes. What had been an all-day trip on foot to cross the border to sell animals now takes just five hours, allowing them to double the number of animals they take and make multiple trips.

One of them, Charo Ochogi, said he'd rather be doing something else but there are few options, and he's not worried about the animals disappearing.

"The kob isn't going to finish. They'll reproduce," he said.

© 2024 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed without permission.

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The Physics Classroom has been devoted to helping students, teachers, and classrooms since the 1990s. We are as passionate about that mission now as we have ever been. If you are a teacher of Physics or Physical Science, we encourage you to use our Video Tutorial with your students. And we also encourage you to consider the use of other resources on our website that coordinate with the video. We have listed a few below to help you get started.  

Teacher Toolkits: Vectors

Curriculum Corner: Vectors and Projectiles

Calculator Pad, Vectors and Projectiles Chapter, Problems #19 - #21

Physics Interactives - River Boat Simulator

Concept Builder: Relative Velocity

Minds On Physics App #1, Vectors and Projectiles Module, Mission VP6

Physics Classroom Tutorial, Vectors and Motion in Two Dimensions Chapter, Relative Velocity and River Boat Problems

IMAGES

  1. Relative Velocity and River Boat Problems

    riverboat physics classroom

  2. Relative Velocity and Riverboat Problems

    riverboat physics classroom

  3. River boat concept || Kinematics||Physics||class11

    riverboat physics classroom

  4. Relative Velocity and Riverboat Problems

    riverboat physics classroom

  5. Riverboat

    riverboat physics classroom

  6. Relative velocity in 2 Dimensions

    riverboat physics classroom

VIDEO

  1. going on a riverboat cruise in china

  2. A battalion of soldiers is ordered to swim across a river 500 m wide. At what minimum rate should

  3. Thermodynamics(Class 11 PHYSICS) ClassRoom Lecture-10B(NEET/JEE/MHT-CET)Second law of Thermodynamics

  4. Thermodynamics(Class 11 PHYSICS) ClassRoom Lecture

  5. Applications of Buoyancy: floatation

  6. Physics. Problem solving. 01_08

COMMENTS

  1. Physics Simulation: Riverboat Simulator

    The Riverboat Simulator Interactive allows a learner to investigate the effect of a river current, river width, and boat velocity upon the time to cross a river and the arrival location on the opposite bank. ... Or if desired, The Physics Classroom has prepared two exercises for a more directed experience. The exercises were designed with the ...

  2. Relative Velocity and River Boat Problems

    This angle can be determined using a trigonometric function as shown below. tan (theta) = (opposite/adjacent) tan (theta) = (3/4) theta = invtan (3/4) theta = 36.9 degrees. Given a boat velocity of 4 m/s, East and a river velocity of 3 m/s, North, the resultant velocity of the boat will be 5 m/s at 36.9 degrees.

  3. PDF Riverboat Simulation

    1. Navigate to the Riverboat Simulator page (Shockwave Physics Studios section) and experiment with the on-screen buttons in order to gain familiarity with the control of the animation. The width of the river, speed of the river, speed of the boat, and direction (or heading) of the boat can be modified. The animation can be started, paused ...

  4. PDF Riverboat Simulation Activity Purpose

    Show your calculations; use the simulation to check your prediction. Repeat the above calculations to determine the boat speed required to cross the 100-m wide river in time if the current speed was 5 m/s and the waterfall was located 45.0 m downstream. Again, check your predictions using the simulation.

  5. PDF Relative Velocity and Riverboat Problems

    MOP Connection: Vectors and Projectiles: sublevel 6 (and maybe sublevel 5) 1. Planes fly in a medium of moving air (winds), providing an example of relative motion. If the speedometer reads 100 mi/hr, then the plane moves 100 mi/hr relative to the air. But since the air is moving, the plane's speed relative to the ground will be different than ...

  6. Vector and Projectiles

    Mission VP6 focuses on the scenario of a motorized boat crossing a river in the presence of a current.

  7. Physics Simulations: Kinematics

    1-Dimensional Kinematics. Vector Walk. This Interactive highlights the distinction between distance and displacement. Three different motions are presented to the learner with the challenge of determining the distance traveled and the overall displacement for each. Now available with Task Tracker compatibility.

  8. RiverBoats

    This is Teacher Preview mode. Teacher Preview allows teachers with Task Tracker accounts to view the questions in a Concept Checker. By viewing questions and their organization in

  9. Physics Simulations: Vectors and Projectiles

    Drag a vector onto the canvas. Drag the arrowhead to change its direction. Repeat up to two more times and guess the direction of the resultant. Click/tap a button and the resultant is drawn. Don't we all wish that adding vectors was that easy. With the Vector Addition Interactive, a learner can improve their understanding and skill at adding ...

  10. oPhysics: Interactive Physics Simulations

    oPhysics. Description. This is a simulation of a boat crossing a river. Adjust the direction the boat is aimed, the boat's velocity relative to the river, and the river's velocity relative to the earth. Press the "Run" button to watch the boat's trip across the river. Questions to answer: 1) What direction should the boat be aimed to get to the ...

  11. Physics Simulation: Riverboat Simulator

    This collection of interactive simulations allow learners of Physics to explore core physics concepts by altering variables and observing the results. This section contains more than 70 simulations and the numbers continue to grow.

  12. PDF Relative Velocity and Riverboat Problems

    MOP Connection: Vectors and Projectiles: sublevel 6 (and maybe sublevel 5) 1. Planes fly in a medium of moving air (winds), providing an example of relative motion. If the speedometer reads 100 mi/hr, then the plane moves 100 mi/hr relative to the air. But since the air is moving, the plane's speed relative to the ground will be different than ...

  13. Phys-A and B-DL: Riverboat Simulator oPhysics

    Physics 2nd Sem. Phys-A and B-DL. Participants. General. Helpful General Links. Chapter 1: The Science of Physics; Measurement and... Ch.2.1: Motion and Graphs. Ch 2.2, 2.3 Acceleration, Kinematics, and Free fall. Ch 3.1: Vectors and Components. Ch 3.4: Relative Motion. Riverboat Simulator oPhysics - Relative Motion. Ch 3.3: Motion in Two ...

  14. RiverBoat2 (1) (1) (docx)

    Physics document from Saint Francis Degree College (B) Behind Ayub Market SraiAlamgir, Sujrat, 4 pages, From The Physics Classroom's Physics Interactives http:/www.physicsclassroom.com Riverboat Simulation Activity Purpose: The purpose of this activity is to analyze the relationship between the two vector components of motion for a river boat as it travels

  15. 1.1.3 Riverboat Simulator Activity physicsclassroom

    1. Navigate to the Riverboat Simulator page and experiment with the on-screen buttons in order to gain familiarity with the control of the animation. The width of the river, speed of the river, speed of the boat, and direction (or heading) of the boat can be modified. The animation can be started, paused, continued, single-stepped or rewound. After gaining familiarity with the program, use it ...

  16. Activity

    4. Run the simulation with the following combinations of Boat Speed and River Speed values with a Heading of 0 degrees (Due East). Before running each simulation, perform quick calculations to determine the time required for the boat to reach the opposite bank (of a 100-meter wide river) and the distance that the boat will be carried downstream by the river current.

  17. Relative Velocity and River Boat Problems Teacher Resources

    Hop on our River Boat Simulator and take a trip across the river. Students can head their boat across the river or at an angle upstream or downstream; change the current speed or the river width; and EXPLORE! The simulation is accompanied by two different classroom-ready activity pages. Concept Builder: Relative Velocity.

  18. PDF Riverboat Simulator Activity KEY

    Direction: θ = 14.0° South of East. 15 m/s. 20 m/s. θ 4 m/s. θ 5 m/s. For the two sets of boat and current velocities listed above, use the Pythagorean theorem to calculate the resultant displacement of the boat in order to cross the 190-meter wide river. Show your calculations for each.

  19. RiverBoat2

    the river speed is 3 m/s , with the waterfall being 45 m downstream , 45 m / 3 m/ s = time it take to carry something to the waterfall , 15 sec . 100 m wide river in 15 seconds , so the velocity would be defined by 100m / 15s = 6.7 m/s Repeat the above calculations to determine the boat speed required to cross the 100 -m wide river in time if ...

  20. JW Riverboat Lab.docx

    If the waterfall is 45m downstream and the current is 3m/s the boat will reach the waterfall in 15s (45m/3m/s=15s). The minimum speed the boat must travel is 7m/s as it will take about 14.3s to cross (100m/7m/s=14.29s). If you went down to 6m/s boat speed the boat would exceed the 15 second limit (100m/6m/s=16.67) Repeat the above calculations to determine the boat speed required to cross the ...

  21. Outdoor classroom rebuilt after Fiona becomes tribute to late teacher

    When the outdoor classroom at Vernon River Consolidated School in eastern Prince Edward Island was destroyed by falling trees during post-tropical storm Fiona in 2022, Roach was determined to ...

  22. Relative Velocity and Riverboat Problems

    If the PDF does not show in the window above, then you can access it directly here: Relative Velocity and Riverboat Problems (PDF) The Curriculum Corner contains a complete ready-to-use curriculum for the high school physics classroom. This collection of pages comprise worksheets in PDF format that developmentally target key concepts and ...

  23. Relative Velocity and River Boat Problems Learning Tools

    This video tutorial lesson discusses the concept of relative velocity. The concept is applied to explain the analysis of the motion of planes moving amidst winds and the motion of boats heading up, down, and across a river in the presence of a current.

  24. New study reveals impact of baseline choice on 2022 Yangtze River

    In the summer of 2022, China's Yangtze River Valley (YRV) endured an unprecedented heat wave, severely affecting human society and ecosystems. Traditionally, the extremity of such hot events has ...

  25. South Sudan says its 6M antelope make up world's largest land mammal

    Seen from the air, they ripple across the landscape—a river of antelope racing across the vast grasslands of South Sudan in what conservationists say is the world's largest land mammal migration.

  26. Relative Velocity and River Boat Problems Teacher Resources

    This video tutorial lesson discusses the concept of relative velocity. The concept is applied to explain the analysis of the motion of planes moving amidst winds and the motion of boats heading up, down, and across a river in the presence of a current.