1. All the ramps below are identical, smooth and 5 m high except for the shape of their inclines. The crates at the top of each ramp are identical, with a mass of 2 kg. Initially, stationary crates are released from the top of the ramps. What is the initial GPE of the crates in each case? Show and explain your work.

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

14. a body is projected with velocity vi from a. at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is

Steelhead trout migrate up stream to spawn. occasionally they need to leap up small waterfalls to continue their journey. fortunately, steelhead are remarkable jumpers, capable of leaving the water at a speed of 8.0 m/s. a. what is the maximum height a steelhead trout can jump? b. leaving the water at 8.0 m/s, the trout lands on top of the water fall 1.8 m high. how long was it in the air?