Ice Skating!
A figure skater encounters a rough patch. Calculate the length of ice that should be resurfaced.
Car Crash!
Two cars collide. Calculate the coefficient of friction between the car and the road.
Free Kick!
Calculate the force due to air resistance acting on the soccer ball as it soars through the air.
Ice Block on a Hill!
If all the friction work is dissipated as heat, calculate the fraction of ice that melts.
Pushing a Toy Car!
Find the work done on the toy car.
Celebrating a Soccer Goal
A soccer player celebrates a goal by falling to his knees and sliding across the ground. If the mass [...]
Emergency Escape!
Calculate the minimum height of an emergency escape ramp to safely divert a truck with faulty brakes.