Q9 of 31 Page 128

What is the momentum of an object of mass m moving with a velocity?

(a) (mv)2 (b) mv2 (c) 1/2mv2 (d) mv

(d) mv

Given,


Mass = m


Velocity = v


Therefore, Momentum =?


We know that,


Momentum, P = Mass x Velocity


= mv


Therefore, option (d) mv is correct.


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8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate:

(a) The net accelerating force,


(b) The acceleration of the train, and


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