A constant force of magnitude F acts on an object of mass 0.04kg initially at...

JAMB 1986

A constant force of magnitude F acts on an object of mass 0.04kg initially at rest at a point O. if the speed of the object when it has moved 50m from O is 500ms^-1, what is the value of F?

A. 0.4N
B. 100.0N
C. 250.0N
D. 1000.0N

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Correct Answer: Option B

Explanation

F = ma and V² = U² + 2aX

F = m\(\frac{(V^2 - U^2)}{2X}\)

= 0.04\(\frac{(500^2 - 0^2)}{2 \times 50}\)

F = 100N

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A constant force of magnitude F acts on an object of mass 0.04kg initially at...

Correct Answer: Option B

Explanation

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