Question

Akhtar, Kiran and Rahul were riding in a motor car that was moving with a high velocity on an expressway
when an insect hit the windshield and got struck on the windscreen. Akhtar and Kiran started pondering over
the situation. Kiran suggested that the insect suffered a greater change in momentum as compared to the
change in momentum of the motor car (because the change in velocity of the insect was much more than that
of motor car). Akhtar said that since the motor car was moving with a larger velocity, it exerted a larger force
on the insect; and as a result the insect died. Rahul while pulling on a new explanation that the both the motor
car and the insect experienced the same force and a change in their momentum.

Answer 1

Answer:

Rahul is giving the right explanation

as per the law of conversion of momentum

Answer 2

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Rahul gave the correct reasoning and explanation that both the motorcar and the insect experienced the same force and a change in their momentum. As per the law of conservation of momentum.

When 2 bodies collide:

Initial momentum before collision

= Final momentum after collision

m1 u1+ m2 u2

= m1 v1+ m2 v2

The equal force is exerted on both the bodies but, because the mass of insect is very small it will suffer greater change in velocity.