posted by Janet on .
Tom pushes a 50 kg up a ramp. The ramp is 6 m long and is set at a 15 degree angle. Starting with an initial speed of 1 m/s, Tom begins pushing the box up with a force of 250N. What will the final speed of the box be at the top?
Are you supposed to assume the process is frictionless? I can't imagine a frictionless box on a ramp.
Conservation of energy would be a good way to attack the problem.
Subtract the potential energy increase from the work done by the person pushing.
If there is no friction, the difference will be the kinetic energy increase.