Gravitation Tes...

Two identical solid copper spheres of radius R are placed in contact with each other. The gravitational attraction between them is proportional to

The following question has four choices out of which ONLY ONE is correct.

The gravitational potential energy of a body at a distance 'r' from the centre of earth is U. What will be its weight at a distance R from the centre of the Earth?

The following question has four choices out of which ONLY ONE is correct.

Four particles of mass m each are placed at four corners of a square of side a. What is the work needed to be done on this system to increase the side of the square to 2a?

The following question has four choices out of which ONLY ONE is correct.

If a body is raised from the surface of Earth upto height 'R', what is the change in potential energy?

Kepler's second law states that the straight line joining a planet to the sun sweeps out equal areas in equal time. This statement is equivalent to which of the following statements?

According to Kepler’s Law of periods, The  _______________ of the time period of revolution of a planet is proportional to the cube of the  ___________ of the ellipse traced out by the planet

According to Kepler’s Law of areas,