Advertisements
Advertisements
प्रश्न
Define gravitational potential energy.
Advertisements
उत्तर
Potential energy of a body at a point in a gravitational field is the work done by an external agent in moving the body from infinity to that point.
APPEARS IN
संबंधित प्रश्न
If the masses of the Earth and Sun suddenly double, the gravitational force between them will ___________.
A planet moving along an elliptical orbit is closest to the Sun at distance r1 and farthest away at a distance of r2. If v1 and v2 are linear speeds at these points respectively. Then the ratio `"v"_1/"v"_2` is
If the distance between the Earth and Sun were to be doubled from its present value, the number of days in a year would be ___________.
An object of mass 10 kg is hanging on a spring scale which is attached to the roof of a lift. If the lift is in free fall, the reading in the spring scale is ___________.
Define the gravitational field.
Write unit of the gravitational field.
Is potential energy the property of a single object? Justify.
What is the difference between gravitational potential and gravitational potential energy?
Prove that at points near the surface of the Earth, the gravitational potential energy of the object is U = mgh.
Earth revolves around the Sun at 30 km s−1. Calculate the kinetic energy of the Earth. In the previous example, you calculated the potential energy of the Earth. What is the total energy of the Earth in that case? Is the total energy positive? Give reasons.
