Law Of Inertia Definition

Sir I want to know that who gave the Law of Inertia and what is the definition of this law so can you tell me the same

[Shaleen]

Hey the Law Of Inertia states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

This law was given by the Great scientist Sir Issac Newton

Two Clauses and a Condition

There are two clauses or parts to this statement - one that predicts the behavior of stationary objects and the other that predicts the behavior of moving objects.


Some Common Examples :

A package thrown out of an airplane will continue to move at the speed of the airplane on the horizontal axis (in the direction of the airplane's movement). Since the law of gravity acts on the package (a vertical downward axis), the package will gather speed along the vertical axis, but on the horizontal axis its speed will remain equal to that of the airplane.


One's body movement to the side when a car makes a sharp turn.

Tightening of seat belts in a car when it stops quickly.

A ball rolling down a hill will continue to roll unless friction or another force stops it.

Men in space find it more difficult to stop moving because of a lack of gravity acting
against them.

If pulled quickly, a tablecloth can be removed from underneath of dishes. The dishes
have the tendency to remain still as long as the friction from the movement of the
tablecloth is not too great.

Shaking a bottle of ketchup. When bringing the bottom down, the suddenly stopping
it, inertia is what causes the ketchup to come out of the bottle.

When playing football, a player is tackled and his head hits the ground. The impact
stops his skull, but his brain continues to move and hit the inside of his skull. His
brain is showing inertia.

Hovercraft are vehicles that can be a challenge to manipulate because, unlike cars,
they do not have the same level of friction, so inertia causes the Hovercraft to want to
continue in its same direction without stopping or turning.

Abruptly stopping a cart with an object on top causes the object on top to fall off.
Inertia causes this by making the object want to continue moving in the direction that
it was.

If a stopped car is hit by a moving car from behind, the passengers inside may
experience whiplash as a result of the body moving forward but the head lagging
behind. The head is experiencing inertia.

If a car is moving forward it will continue to move forward unless friction or the
brakes interfere with its movement.

When a baseball is thrown it will continue to move forward until acted upon by
gravity. The greater the force of the throw, the harder it is for gravity to act upon it.
A hockey puck will continue to slide across ice until acted upon by an outside force.

A balloon in a car will appear to move when the car moves forward, but the balloon is
actually attempting to stay in the place it was, it is only the car that is moving.