Question

plz solve no. 17
and 18
very urgent, plz solve quickly

Answer 1

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Question

Akhtar, Kiran and Rahul were riding in a motorcar that was moving with a high velocity on an expressway when an insect hit the windshield and got stuck 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 motorcar (because the change in the velocity of insect was much more than that of the motorcar). Akhtar said that since the motorcar was moving with a larger velocity, it exerted a larger force on the insect. And as a result the insect died. Rahul while putting on entirely new explanation said that both the motorcar and the insect experienced the same force and a change in their momentum. Comment on these suggestions.

Answer

• Rahul's explaination is acceptable and correct that both the motorcycle and insect experienced the same force
• There is a change in momentum
• According law of conservation of momentum when two body collide then

❤ Initial momentum before collision = Final momentum after collision

m1u1 + m2u2 = m1v1 + m2v2

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

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