Advertisements
Advertisements
Question
Two bodies A and B of equal masses are kept at heights of h and 2h respectively. What will be the ratio of their potential energies?
Advertisements
Solution
Potential energy of a body is directly proportional to the height of the object.
Hence , `"Potential energy of A"/"Potential energy of B" = 1/2`
Ratio of A and B = 1:2
APPEARS IN
RELATED QUESTIONS
Gravitational potential energy U = mass × force of gravity on unit mass × ..........
A body of mass m is moved from ground to a height h. If force of gravity on mass of 1 kg is g newton, find the work done in lifting the body.
A body at a height possesses ______.
A spring is kept compressed by a small trolley of mass 0.5 kg lying on a smooth horizontal surface as shown in the adjacent fig. When the trolley is released, it is found to move at a speed v = 2 m s-1. What potential energy did the spring possess when compressed?
A ball of mass m is thrown vertically up with an initial velocity so as to reach a height h. The correct statement is:
What happens to the potential energy of a body when its height is doubled?
A weightlifter is lifting weights of mass 200 kg up to a height of 2 metres. If g = 9.8 m s−2, calculate :
work done by the weightlifter
Explain by an example what is meant by potential energy. Write down the expression for gravitational potential energy of a body of mass m placed at a height h above the surface of the earth.
When a ball is thrown vertically upwards, its velocity goes on decreasing. What happens to its potential energy as its velocity becomes zero?
A car is accelerated on a levelled road and acquires a velocity 4 times of its initial velocity. During this process, the potential energy of the car :
