Question

A 1500 kg car Coast down a hill starting from rest and decreases its high by 22 M over a distance of 100 m of travel how fast will it be going at the end of the Hill if friction has no effect in slowing its motion

Answer 1

I took the test the answer is 21 m/s

Step-by-step explanation:

Answer 2

To solve this:Initial KE = 0 J meaning it begins at rest
ΔKE = ΔGPE meaning there is no friction
let speed at bottom of hill = v
so (1/2)mv² = mgΔh
v² = 2gΔh
v = √[2 * 9.8 * 22]
v = 21 m/s would be the answer if friction has no effect in slowing its motion