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Question: Answered & Verified by Expert
A particle moves in a straight line with retardation proportional to its displacement. The loss of kinetic energy during a displacement x is proportional to
PhysicsWork Power EnergyNEET
Options:
  • A x2
  • B ex
  • C x
  • D log ex
Solution:
1098 Upvotes Verified Answer
The correct answer is: x2
dv dt ∝ - x

dv dx · dx dt = - cx

Vdv = - cx dx

v 2 2 = - cx 2 2

Kinetic energy = mv 2 2

Kinetic energy = mcx 2 2

k ∝ x 2

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