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When a cieling fan is switched on it makes 10 revolutions in 1st 3 seconds Assumming a uniform angular acceleration how many rotations it will make in next 3 seconds

When a cieling fan is switched on it makes 10 revolutions in 1st 3 seconds Assumming a uniform angular acceleration how many rotations it will make in next 3 seconds

Grade:12

1 Answers

Badiuddin askIITians.ismu Expert
147 Points
11 years ago

Dear pallavi

θ= 1/2 αt2

10 =1/2 * α *9

α =20/9 rev /sec2

 

so revolution in 6 sec

θ= 1/2 αt2

  = 1/2 * 20/9 * 36

   =40

revolution in next 3 sec = revolution in 6 sec - revolution in 3 sec

                                  =40    -10

                                  =30

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