Use Conservation of Energy to solve the problem

Question

A 1000 kg car is initially at rest at the bottom of a 10.0 meter long, 30-degree ramp. It accelerates up due to a static friction force of 8500 N, launches off the top of the ramp, and crashes back to Earth. What is the car’s speed just before it hits the ground?

Answer 1

During the whole process, the energy the car gained is the kinetic energy that which is coming from the work done by the 8500-N fiction over the length of 10-meter, so we have:

.

Therefore the speed is:

.

Apply the value of the F, L and m you will get the speed v.