Laws of Motion
• Force is defined as an agent which changes or tends to change the state of rest or uniform motion of a body or changes its direction or shape. The SI unit of force is newton (N). In cgs system, force is measured in dyne.
• Force is the cause
• Newton’s first law of motion is also known as law of inertia. Inertia of a body is defined as the tendency of the body to resist any change in its state of rest or motion. Mass is the measure of inertia of a body.
• Newton’s second law states that the rate of change of linear momentum of the body is directly proportional to the force applied on it and the change takes place in the direction of the applied force.
• Newton’s third law of motion states that for every action there is an equal and opposite reaction. Examples of Newton’s third law of motion are walking, recoil of gun and rocket propulsion.
• Action and reaction forces always reac
- The force of attraction between any two objects having masses is known as Gravitation. It is responsible for keeping the earth and other planets in their orbits.
- Universal law of gravitation states that in this universe, every mass attracts every other mass towards itself with