The momentum of an object of mass 200 kg moving with a uniform velocity of 90km/h is:-
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A motorcar of mass 1200 kg is moving along a straight line with a uniform velocity of 90 km/h. Its velocity is slowed down to 18 km/h in 4 s by an unbalanced external force.
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Given : Mass of the motorcar, M=1200kg
Initial velocity of the car, u=90 km/h=25 m/s (∵1km/h=
18
5
m/s)
Final velocity of the car, v=18 km/h=5 m/s
Time taken t=4 s
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