PHYSICS [3 Mark Question Answer]

According to newton's third law, for every action, there is always an equal and opposite reaction.
To demonstrate newton's third law blow a balloon and hold its neck tightly facing downwards. When we release the balloon, the balloon will move up instead of falling to the ground. As air is releasing from bottom of the balloon and this air apply equal and opposite force to the balloon and this force helps the balloon to move upwards

Newton law of gravitation is that every object in the universe attracts every other object with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

'g' is the acceleration due to earth's gravity and 'G' is universal gravitational constant.

Newton law of gravitation is that every object in the universe attracts every other object with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Gravity is the force of attraction between the object and the earth whereas gravitation refers to the force of attraction that exists between any two bodies that possess mass.

According to Newton's third law, for every action, there is always an equal and opposite reaction. Rocket works on the same principle. The exhaust gases produced as the result of the combustion of the fuel are forced out at one end of the rocket. As a reaction, the main rocket moves in the opposite direction.

According to newton's second law of motion, when a force acts on a body, the rate of change in momentum of a body is equal to the product of the mass of the body and acceleration produced in it.
Yes, Newton's first law is contained in the second law as if force is zero then the acceleration would be zero which means the body would remain in its state of rest or in state of constant motion.

Mass of the body is constant at all positions so mass will not change. But weight will change as gravity on the surface of earth is almost 6 times than on the surface of the moon, so its weight will increase almost 6 times on the surface of earth.

An object possesses two kinds of inertia, the inertia of rest and inertia of motion. A book lying on a table will remain placed at the table unless it is displaced by some external force. This is an example of inertia of rest.
A ball rolling on the ground will continue to roll unless the external force, the force of friction between the ball and the ground stops it.

A person applies force on the water in backward direction and water according to the third law of motion water apply an equal and opposite force in the forward direction which helps a person to swim.

When we fire a gun, a force is exerted in the forward in the forward direction as the bullets comes out; in reaction to which an equal and opposite force is act in the backward direction and hence, we feel a backward jerk on the shoulder.

When a hanging carpet is beaten using a stick, the dust particles will start coming out of the carpet because the part of the carpet where the stick strikes, immediately come in motion while the dust particle sticking to the carpet remains at rest. Hence a part of the carpet moves ahead along with the stick, and the dust particles fall down due to the earth's pull.

A book lying on a table will remain placed at the table unless it is displaced by some external force. This is an example of inertia of rest.
A ball rolling on the ground will continue to roll unless the external force, the force of friction between the ball and the ground stops it.