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AP EAMCET20226 Jul 2022Morning ShiftPhysicsMotion in Two DimensionsActual

A fan is rotating with an angular speed 300 rpm . The fan is switched off, and it takes 80 ~s to come to rest. Assuming constant angular deceleration, the number of revolutions made by the fan before it comes to rest is

Options

  1. A400
  2. B200
  3. C300
  4. D314

Correct answer

B. 200

Step-by-step solution

As = ₀+ t aligned & f = f ₀+ 2 t & 0=5+ 2 80 & =- 10 80 =- 8 rad / sec ^2 aligned So, = 1 2 8 80^2 =400 No. of revolution = 400 2 =200

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