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NEET2019PhysicsWork, Power and EnergyActual

A particle of mass 7 kg is executing circular motion with time period of 11 sec . Find out centripetal force, if radius of circle is 10 m .

Options

  1. A30 7 ~N
  2. B40 7 ~N
  3. C30 N
  4. D160 7 ~N

Correct answer

D. 160 7 ~N

Step-by-step solution

Given, Time period ( T )=11 sec , mass of particle ( m )=7 ~kg and radius ( r )=10 ~m Speed of particle, v= 2 r T = 2 22 7 10 11 = 40 7 ~m / s Centripetal force, F = mv ^2 r = 7 40 7 40 7 10 = 160 7 ~N

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