Advertisements
Advertisements
प्रश्न
Find the gravitational potential energy of 2.5 kg mass kept at a height of 15 m above the ground. The force of gravity on mass 1 kg is 10 n.
Advertisements
उत्तर
Mass m = 2.5 kg
Gravitational potential energy is the work done against the force of gravity ¡s stored in the body at a height h.
P.E = U = mgh
U = 2.5 × 10 × 15
U = 25/10 × 10 × 15 = 375 J
APPEARS IN
संबंधित प्रश्न
A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.
The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why?
Two bodies of same masses are placed at heights h and 2h. Compare their gravitational potential energy.
Define the term potential energy of a body.
A body falls freely under gravity from rest. Name the kind of energy it will possess at the point from where it falls.
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?
A boy weighing 50 kg climbs up a vertical height of 100 m. Calculate the amount of work done by him. How much potential energy does he gain? (g = 9.8 m/s2)
To what height should a box of mass 150 kg be lifted, so that its potential energy may become 7350 joules? (g = 9.8 m/s2)
What is the difference between gravitational potential energy and elastic potential energy? Give one example of a body having gravitational potential energy and another having elastic potential energy.
What energy is possessed by stretched rubber?
