An apple falls from a tree because of the gravitational attraction between the earth and the apple. If F1 is the magnitude of the force exerted by the earth on the apple and F2 is the magnitude of the force exerted by the apple on the earth, then

The earth and the moon are attracted to each other by gravitational force. The earth attracts the moon with a force that is:

A rectangular wooden block has the length, breadth and height of 40 cm, 35 cm and 10 cm, respectively. This wooden block is kept on ground in three different ways, turn by turn.

Which of the following is the correct statement about the pressure exerted by this block on the ground?

Choose the correct unit for the relative density among the following:

Two objects of different masses falling freely near the surface of moon would:

The value of quantity G in the law of gravitation

The atmosphere is held to the Earth by

The weight of an object at the centre of the Earth of radius R is

When a ship floats in sea water

The SI unit of pressure is