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?

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?

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 ?

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.

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?

A metal bar of mass 1.5 kg is heated at atmospheric pressure. Its temperature is increased from 30 °C to 60 °C. Then the work done in the process is (Volume expansion coefficient of the metal = 5xx10^(-5)^(@)C^(-1) , density of the metal =9xx10^3kgm^(-3) Atmospheric pressure =1xx10^5Pa )

The radius of gyration of a flywheel is (3/π ) m and its mass is 1 kg. If the speed of the flywheel is changed from 20rpm to 60 rpm, then the work done would be

Answer the following questions Solve A cart with mass of 20kg went 50m in a straight line on a plain and smooth road when a force of 2N was applied to it .How much work was done by the force?

Solve the following questions : A cart with mass 20 kg went 50m in a straight line on a plain and smooth road when a force of 2 N was applied to it . How much work was done by the force ?

A liquid drop of mass 1 g falls from a cliff 1 km high. It hits the ground at the bottom of the cliff with a speed of 50 m//s . What is the work done by the unknown resistive force?

Two cars are moving on two perpendicular roads towards a crossing with uniform speeds of 72 km/hr and 36 km/hr. If first car blows horn of frequency 280 Hz, then the frequency of horn heard by the driver of second car when line joining the cars make 45^@ angle with the roads will be