Kinematic: an object drop 20m from a cliff. if it started at rest and is going 20m/s just before it hits the ground, what is it’s acceleration?

10 m/s²

Explanation:

a =?

h = 20m,

u(initial velocity) = 0 m/s ( since it starts at rest,

v = 20m/s

Using equation of motion,

V² = U² + 2as

V² - U² = 2as

a = (v² - u²) / 2s

a = (20² -0) / 2 *20

a = 400 / 40

a = 10 m/s²

answer: electrons

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