Question

(1) An 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
(c) The force of wagon 1 on wagon 2.
(ii). Velocity versus time graph of a ball of mass 50 g rolling on a concrete floor
is shown in Fig. Calculate the acceleration and frictional force of the floor on the
ball.
Velocity (ms
Time (s)
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Answer 1

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your answer is

option no B