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

Question

Physics

Jaxon Whitaker

17 June, 12:34

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

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Bird · Answer 1

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