Simple relative motion of two balls with graphs
http://physics.bu.edu/~duffy/HTML5/relative_velocity_race.html
Simple relative motion of two balls with graphs
http://physics.bu.edu/~duffy/HTML5/relative_velocity_race.html
See boat crossing river, change boat speed/direction to get it straight across
Helen rates this resource as good
Simple version of river crossing – choose speed/direction
https://simbucket.com/riverboat/
Helen rates this resource as good
Change speed of river, speed of boat, see landing place
http://www.physicsclassroom.com/Physics-Interactives/Vectors-and-Projectiles/Riverboat-Simulator