A train of 150 metre ton is drawn up a rough inelined plane of 1 in 100 at the rate of 36 km. if the frictional force is 12 N ton^-1 ,calculate the power of the engine.

A force of 10 N moves a body with a constatn speed of 2ms^-1 . Calculate the power of the body?

A 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: the acceleration of the train.

A 8,000 kg engine pulls a train of 5 wagons, each of 2,000 kg along a horizontal track. If the engine exerts a force of 40,000 N and track offers a force of friction of 5,000 N, then calculate the :force of wagon 1 on wagon 2.

When a body slides down from rest along a smooth inclined plane making anangle of 45^@ with the horizontal, it takes time T. when the same body slides down from rest along a rough inclined plane making the same angle and through the same distance, it is seen to take time pT, where p is some number greater than 1. Calculate the co-efficient of friction between the body and the rough plane.