Question

7. A 8000 kg engine pulls a train of 5 wagoris, 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 and
(b) the acceleration of the train.
8. An automobile vehicle has a mass of 1500 kg. What must
be the force between the vehicle and road if the vehicle is to
be stopped with a negative acceleration of 1.7 m s-??
9. What is the momentum of an object of mass m, moving with a
velocity u?
(a) (mu) (b) mu?
(C) 1/2 mu2
(d) mu
10. Using a horizontal force of 200 N, we intend to move a wooden
cabinet across a floor at a constant velocity. What is the friction
force that will be exerted on the cabinet?​

Answer 1

Answer:

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Answer 2

Answer:

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