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JEE Main201911 Jan 2019Morning ShiftPhysicsMotion in Two DimensionsActual

A particle is moving along a circular path with a constant speed of 10 ~ms ⁻¹ . What is the magnitude of the change in velocity of the particle, when it moves through an angle of 60^ around the centre of the circle?

Options

  1. A10 3 ~m / s
  2. Bzero
  3. C10 2 ~m / s
  4. D10 ~m / s

Correct answer

D. 10 ~m / s

Step-by-step solution

Change in velocity, array l | v |= v ₁²+ v ₂²+2 v ₁ v ₂ ( - ) =2 v 2 ( | v ₁ |= | v ₂ | )= v =(2 10) (30^ )=2 10 1 2 =10 ~m / s array

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