Advertisements
Advertisements
Question
Write the expression for the gravitational potential energy explaining the meaning of the symbols used.
Advertisements
Solution
Expression for the gravitational potential energy: P.E. = U = mgh
Where U is gravitational potential energy m is the mass of the body.
g is force of gravity on the mass of 1 kg
mg is the force acting on body
h is the distance or height moved above the ground level.
APPEARS IN
RELATED QUESTIONS
The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why?
State two factors on which the potential energy of a body at a certain height above the ground depends.
Two bodies A and B of masses 10 kg and 20 kg respectively are at the same height above the ground. Which of the two has greater potential energy?
Two bodies of same masses are placed at heights h and 2h. Compare their gravitational potential energy.
A body at a height possesses ______.
What happens to the potential energy of a body when its height is doubled?
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)
If 784 J of work was done in lifting a 20 kg mass, calculate the height through which it was lifted. (g = 9.8 m/s2)
Prove that the kinetic energy of a freely falling object on reaching the ground is nothing but the transformation of its initial potential energy.
Which of the following is the example potential energy?
