A 1000 Kg engine pulls a train of 4 wagons each of 2500 Kg along a horizontal railway track. If the engine exerts a force of 50000 N on wagons and tyrack offers force of friction 10000 N, then calculate the:

a) Net accelarating Force

b)Accelaration of the train

c)The force of Wagon-1 on Wagon-2

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(a)

we know that Force = mass x acceleration

given:

Force = 50000 N

Frictional Force = 5000 N

thus, Net Force = Force - frictional Force = 50000 N - 10000N = 40000 N

(b)

Now,

total mass = mass of engine + mass of train = 1000 kg + (4 x 2500 kg) = 11000 kg

thus, acceleration will be

a = net force / total mass = F/m = 40000/11000

or

a = 3.63 m/s^{2}

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