Physics
Grade-10
Easy

Question

What is mass of a car which is revolving around a point. The radius of the circle formed is 120 m. The speed of the rotation is 5 m/s. the centrifugal force acting on the ball is 200 N.

  1. 500 Kg
  2. 750 Kg
  3. 960 Kg
  4. 1000 Kg

Hint:

F equals m v squared over r

The correct answer is: 960 Kg


    mass, m = ?
    velocity,  v = 5 m/s
    radius, r = 120m
    centrifugal force, Fc = 200N
    Using the given formula,  F subscript c equals fraction numerator m v squared over denominator r end fraction
    we will find the missing value,
    200 equals fraction numerator m left parenthesis 5 right parenthesis squared over denominator 120 end fraction
    rightwards double arrow m equals fraction numerator 200 cross times 120 over denominator 25 end fraction
    = 960 kg

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