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A palm fruit dropped to the ground from the top of a tree 45...

A palm fruit dropped to the ground from the top of a tree 45m tall. How long does it take to reach the ground? (g = 10ms^-2)

A.

9s

B.

4.5s

C.

6s

D.

7.5s

E.

3s

View answer & explanation

Correct answer is E

Using the equation of motion

S = ut + \(\frac{1}{2}\)at²

45 = (0 x t) + (\(\frac{1}{2}\) x 10 x t²)

t = 3s

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