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- Homework Statement
- Calculate the average accelerating force down the ramp.

- Relevant Equations
- W = fx

E = mgh

The mass of the bike and person is 190kg

Calculate the average accelerating force from X to Y, if the bike has a velocity of 30 at point Y.

I am struggling with this question, I know that Fx = Work Done, but I also know that the only way to release GPE as KE is for gravity to do positive work on the object (for the object to fall), so in this case the work done by gravity is 190 x 9.8 x 25, so the change in GPE is -(190 x 9.8 x 25), and the KE is 1/2 x 190 x 900, but I am unsure how the accelerating force can cause a change in GPE, as I always thought that it was gravity that does that. Could someone help my understanding please?