Question

question no. 7 please​

Answer 1

7. a)Mass of engine = 8000kg

Mass of each wagon = 2000kg

Although this info has nothing to do with the question,

Anyways,

The force exerted by the engine = 40000N

Frictional force = 5000N

Net accelerating force=40000N-5000N=35000N

Now,

b) Net force = 35000N

Mass = 5×2000 = 10000kg

F = ma

35000 = 10000a

a = 35000/10000

a = 3.5m/s²

Acceleration of train = 3.5m/s²

Cheers!