Question

An object is allowed to fall freely near the surface of an unknown planet. The object falls 72 meters from rest in 4.0 seconds. The acceleration due to gravity on that planet is

Answer 1

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Step-by-step explanation:

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Answer 2

Acceleration due to gravity on that planet, a = 9 m/s²

Explanation:

Initial velocity, u = 0 m/s

Acceleration due to gravity , a = ?

Displacement, s = 72 m

Time , t = 4 s

We have equation of motion s= ut + 0.5 at²

Substituting

s= ut + 0.5 at²

72 = 0 x 4 + 0.5 x a x 4²

a = 9 m/s²

Acceleration due to gravity on that planet, a = 9 m/s²