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26 May, 02:44

The velocity of a 200 kg object is changed from 5 m/s to 25 m/s in 50 seconds by an applied constant force.

a. What change in momentum does the force produced?

b. What is the magnitude of the force?

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  1. 26 May, 02:49
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    a) Change in momentum is 4000 kg m/s in the direction of motionb) Magnitude of the force is 80 N

    Explanation:

    Force is given by rate of change of momentum.

    Mass of object = 200 kg

    Initial velocity = 5 m/s

    Final velocity = 25 m/s

    a) Change in momentum = 200 x 25 - 200 x 5

    Change in momentum = 4000 kg m/s in the direction of motion

    b) Time taken = 50 s

    Rate of change of momentum = Change in momentum : Time

    Rate of change of momentum = 4000 : 50

    Rate of change of momentum = 80 N

    Force = 80 N

    Magnitude of the force is 80 N
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