Question

A body of mass 5kg is moving with a velocity of 20 metre per second if force is applied on the body d for 25 second and it attains a velocity of 40 metre per second. What is the force applied

Answer 1

Answer:

F=dp/dt

  =mdv/dt

  =m(v-u)/dt

   =5(40-20)/25

    =5x20/25

    =100/25

    =4 N

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