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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

Respuesta :

shinmin
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

Answer:

I took the test the answer is 21 m/s

Explanation:

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