Test 3.1

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1. A car is moving with uniform velocity of 15m/s. What is the kinetic energy of a boy of mass 40kg sitting in a car?

Solution: data m=40kg and v=15m/s Velocity of the boy = velocity of the car

Kinetic energy possessed by the boy = (1/2)mv2

                                   =(1/2)*40*15
                                   =4500J