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NEET2005PhysicsMotion in Two DimensionsActual

A stone tied to the end of a string of 1 m long is whirled in a horizontal circle with a constant speed. If the stone makes 22 revolutions in 44 seconds, what is the magnitude and direction of acceleration of the stone?

Options

  1. A^2 ~ms ⁻² and direction along the radius towards the centre
  2. B^2 ~ms ⁻² and direction along the radius away from the centre
  3. C^2 ~ms ⁻² and direction along the tangent to the circle
  4. D^2 / 4 ~ms ⁻² and direction along the radius towards the centre

Correct answer

A. ^2 ~ms ⁻² and direction along the radius towards the centre

Step-by-step solution

(a= v^2 r = ^2 r=4 ^2 n^2 r=4 ^2 ( 22 44 )^2 1= ^2 ~m / s ^2 ) and its direction is always along the radius and towards the centre.

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