Under the force of gravity, a heavy body falls quicker than a light body. (neglect air resistance).

Define the term centre of gravity of a body?

Who told that heavy bodies fall faster than light ones?

Give an example when work done by the force of gravity acting on a body is zero even though the body gets displaced from its initial position.

Two balls a A and B of same size are dropped from the same point under gravity. The mass of A is greater than that of B .If the air resistance acting on each ball is same, then

Write an expression for the force due to gravity on a body of mass m and explain the meaning of the symbols used in it.

The force of gravity is proportional to the masses of the bodies. Then why doesn't a heavy body fall faster than a light body?

Two bodies of masses m1, and m2, moving with velocity u1, and u2, respectively in the same direction collide with each other elastically. Calculate their velocities after the collision. Discuss what happens when (i) Both the colliding bodies have the same mass. (ii) One of the bodies is initially at rest. (iii) A light body collides with a heavy body at rest (iv) A heavy body collides with a light body at rest

A stone is allowed to fall freely from a certain Height. Neglecting air resistance, which graph represents the variation of velocity v with time t ?

Show that the sum of kinetic energy and potential energy (ie, total mechanical energy) is always conserved in the case of a freely falling body under gravity (with air resistance neglected from a height by finding it when (i) the body is at the top c) the body has fallen a distance in the body has reached the ground.

Is the total mechanical energy conserved for a falling body if we include the effect of air resistance during its fall?