A train approaching a station reduces its speed from 180 km/hr to 90 km/hr. If the mass of the train is about 20,000 kg then how much is the work done by the train?

Solve the following examples: The velocity of a car increases from 54 km//h to 72 km//h . If the mass of the car is 1500 kg, find the work done to increase the velocity.

The velocity of a car increase from 54 km/ hr to 75 km/hr. How much is the work done if the mass of the car is 1500 kg ?

The velocity of a car increases from 54 km/hr to 72 km/hr. How much is the work done if the mass of the car is 1500 kg?

Identify the variation and solve : It takes 5 hours to travel from one town to the other, if the speed of the bus is 48 km/h. If the speed of the bus is reduced by 8 km/h, how much time will it take for the same travel ?

Mass of a vehicle is 1500 kg. While ascending on a road, its speed decreases from 72 km/hr to 36 km/hr. How much is the work done?

A train A is travelling at a speed of 108 km hr^(-1) . The train approaches another train B standing on the platform. The engine of the train B blows its hom. The frequency of the horn as observed by the driver in train A is 504 Hz. The frequency of the hom of train B is (speed of sound = 330 ms^(-1) )

A 150 m long trains travelling from east to west at a speed of 20 m/s. A bird is flying from west lo cast at a speed of 5 m/s. How long will the bird take to cross the train?

Solve the following problems: A passenger train takes 2 hours more than an express train to travel a distance of 240 km . The speed of the express train is more than that of passenger train by 20 km/h. Find the speed of both the trains.