A body of mass 8kg moving with a speed of 30ms-1 is brought to rest in 2.5s by a constant retarding force. Calculate the magnitude of the force.

By: |Published on: May 21|Categories: Physics WAEC| 0 comments

A. 240N
B. 96N
C. 20N
D. 9N

Correct Answer: Option B

B. 96N

Explanation

F = ma = mv/t=(8×30)/2.5

=96

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