Newton's Law of Motion

 Newton's law of Motion

Law of motion was propounded by sir issac newton in 1687,in his book principia. There are three laws of motion

Sir Issac Newton 

Force

any action which causes pull or push on a body is called force .force are used in our everybody actions like pushing ,pulling ,lifting ,stretching, twisting and pressing.

Move a stationary body.

Change the state of rest or motion .

Stop a moving body.

Change the speed of a body.

Change the shape and size of a body.

Change the direction of the motion of a moving body.

Force is a vector quantity, its SI unit is newton and CGS unit is dyne

1 newton =1 kg-ms^-2

1 newton = 10⁵dyne

e.g.-force is used when we kick a football, we lift a box from the floor, we stretch a rubber band etc.

Motion

if an object change its position with respect to its surroundings with time, then it is called in motion.

ex-fish swims in water, car or bus mover o a road, train move on the track

Inertia

The property of an object to resist any change in state of motion along a straight line or rest is called inertia.

There are three types of inertia

1.Inertia of rest -if an object resists the change in its state of rest. Its inertia is called inertia of rest.

2.Inertia of motion -if an object resists the change in its state of motion. Its inertia is called inertia of motion.

3.Inertia of direction-if an object resists the change in direction of its motion .its inertia is called inertia of direction.