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Question: Answered & Verified by Expert
A particle moves in a circle of the radius 0.5 m at a speed that uniformly increases. Find the angular acceleration of particle if its speed changes from 2.0 m s-1 to 4.0 m s-1 in 4.0 s.
PhysicsLaws of MotionNEET
Options:
  • A 1 rad s-2
  • B 2 rad s-2
  • C 4 rad s-2
  • D 0 rad s-2
Solution:
1094 Upvotes Verified Answer
The correct answer is: 1 rad s-2
The tangential acceleration of the particle is

at=dvdt=4.0-2.04.0

=0.5 m s-2

The angular acceleration is

α=atr=0.50.5=1 rad s-2

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