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MHT CET 2024 (10 May, Shift 1) · Kinetic Energy & Momentum

Kinetic Energy & Momentum question from MHT CET 2024 (10 May, Shift 1)

Q4MHT CET 2024 · 10 MAY · SHIFT 1Easy

Kinetic Energy & Momentum

If the momentum of a body of mass ' mm ' is increased by 20%20\% then its kinetic energy increases by

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Answer: (a)

  1. K=p22mK = \frac{p^2}{2m}, so K∝p2K \propto p^2 for the same mass.
  2. p′=1.2p⇒K′=(1.2)2K=1.44Kp' = 1.2p \Rightarrow K' = (1.2)^2 K = 1.44K
  3. Increase =44%= 44\%, so the answer is (a).
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