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संबंधित प्रश्न
What are the two kinds of mechanical energy?
Give reasons for the following. No work is done if a man is pushing against a wall.
A man lifts a mass of 20 kg to a height of 2.5 m. Assuming that the force of gravity on 1 kg mass is 10 N, find the work done by the man.
A body of mass 5 kg falls from a height of 10 m to 4 m. Calculate:
The loss in potential energy of the body,
How much work is done by the gravitational force of earth acting on a satellite moving around it in a circular path? Give reason for your answer.
Name the physical quantity whose SI unit is Nm.
No work is done by a man moving on a horizontal road while carrying a box on his head. Explain.
A canon ball of mass 500g is fired with a speed of 15m/s-1. Find: its momentum.
State the amount of work done by an object when it moves in a circular path for one complete rotation. Give a reason to justify your answer.
A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car
