Advertisements
Advertisements
Question
State two factors on which the potential energy of a body at a certain height above the ground depends.
Advertisements
Solution
- Height of the object from above the ground
- Mass of the object
- Gravitational acceleration due to the planet's gravitational force.
Therefore, P. E. = m (mass) × g (gravitational acceleration) × h (height)
APPEARS IN
RELATED QUESTIONS
A body of mass m is moved from ground to a height h. If the force of gravity on mass of 1 kg is g newton, find the force needed to lift the body.
Two bodies of same masses are placed at heights h and 2h. Compare their gravitational potential energy.
A body falls freely under gravity from rest. Name the kind of energy it will possess at the point from where it falls.
A ball of mass m is thrown vertically up with an initial velocity so as to reach a height h. The correct statement is:
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)
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.
A man is instructed to carry a package from the base camp at B to summit A of a hill at a height of 1200 metres. The man weighs 800 N and the package weighs 200 N. If g = 10 m/s2,
- how much work does man do against gravity?
- what is the potential energy of the package at A if its is assumed to be zero at B?
The potential energy of your body is least when you are ______.
A body is falling from a height of h. After it has fallen a height `"h"/2`, it will possess
The potential energy is
