A body of mass 2kg moving vertically upwards has its velocity increased uniformly from 10ms-1...

JAMB 1997

A body of mass 2kg moving vertically upwards has its velocity increased uniformly from 10ms^-1 to 40ms^-1 in 4s. Neglecting air resistance, calculate the upward vertical force acting on the body.[g = 10 ms^-1]

A. 15N
B. 20N
C. 35N
D. 45N

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Correct Answer: Option C

Explanation

F = mg + ma

F = 2 [10 + \(\frac{(40 - 10)}{4}\)]

F = 35 N

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A body of mass 2kg moving vertically upwards has its velocity increased uniformly from 10ms-1...

Correct Answer: Option C

Explanation

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