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Question: Answered & Verified by Expert
An artillery piece of mass M1 fires a shell of mass M2 horizontally. Instantaneously after the firing, the ratio of kinetic energy of the artillery and that of the shell is :
PhysicsWork Power EnergyJEE MainJEE Main 2024 (31 Jan Shift 1)
Options:
  • A M1(M1+M2)
  • B M2M1
  • C M2(M1+M2)
  • D M1M2
Solution:
1519 Upvotes Verified Answer
The correct answer is: M2M1

As linear momentum will be conserved, p1=p2

Now, kinetic energy can be written as KE=p22M.

Also p is the same for both masses. We can write,

KE1m

KE1KE2=p22M1p22M2=M2M1

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