Example 2: In order to get the cart from point 1 to point 2, a 3000 W motor was used to pull the 25 kg cart up the hill. If we assume a frictionless track, determine: a) The energy that must be put in to reach point 2 b) The time it takes for the cart to reach point 2 c) The speed at point 3 d) The height at point 4