Q6 of 46 Page 246

Two objects of same mass, namely A and B hit a man with a speed of 20 km/hr and

50 km/hr respectively and comes to rest instantaneously. Which object will exert more force on that man? Justify your answer.

Let both have a mass of m.

Momentum of A = mass × velocity = 20m


Momentum of B = 50m


Force is defined as the rate of change of momentum. Since both A and B come to rest instantaneously, B exerts a greater force because it has greater momentum.


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