A body weighing 80N stands in an elevator that is about to move. The force...

JAMB 2002

A body weighing 80N stands in an elevator that is about to move. The force exerted by floor on the body as the elevator moves upward with an acceleration of 5 ms-2 is
[g = 10ms-2]

A. 40 N
B. 80 N
C. 120 N
D. 160 N

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Correct Answer: Option C

Explanation

W = Mg

man's weight = 80N then his mass = \(\frac{80}{10}\) = 8kg

T = Mg + Ma = M( g + a) = 8(10 + 5) = 8 x 15 = 120N.

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A body weighing 80N stands in an elevator that is about to move. The force...

Correct Answer: Option C

Explanation

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