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4 years ago

An apple drops from a tree and hits the ground in 1.5s what is its speed just before it hits the ground?

Physics

1 answer:

Zarrin [17]4 years ago

8 0

Vf - Vo = gT

where

Vf = velocity of apple just before hitting the ground

Vo = initial velocity of apple = 0

T = time for apple to hit the ground = 1.5 sec (given)

g = acceleration due to gravity = 9.8 m/sec^2 (constant)

Substituting appropriate values,

Vf - 0 = 9.8(1.5)

Vf = 14.7 m/sec.

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3 years ago

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Answer:

12900 W

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Explanation:

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t = 2.0 s

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a = 0.65 m/s²

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∑F = ma

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F = mg

F = (1500 kg + 400 kg) (9.8 m/s²)

F = 18620 N

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P = W / t

P = Fd / t

P = Fv

P = (18620 N) (1.3 m/s)

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