Question

A body of mass 40 kg starting from rest accelerates uniformly to a speed of 50 metre per second in 5 second brakes are applied and the body stops in next 10 seconds calculate the accelerating force and the force or retarding force *

2 points

Accelerating force=30N, retarding force=-60N

Accelerating force=400N, retarding force=-200N

accelerating force=100N, retarding force=-200N

accelerating force=400N, retarding force=-100N​

Answer 1

Explanation:

Accelerating force=Mass*Acceleration

=40kg*(50m/s- 0m/s//5s)

=400N

Retarding force =Mass*Retardation

=40kg*(0m/s- 50m/s//10s)

=-200N

Hence the correct option is b)

Hope it helps

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