Question

what is newton's law of motion?
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Answer 1

Answer:

Explanation:

There are 3 Newtons laws of motion  !

FIRST LAW OF MOTION

Every body maintains its initial state of rest or motion with uniform speed on a straight line unless an external force applied on it.

First law is also called LAW OF GALILEO OR LAW OF INERTIA.

EXAMPLES OF INERTIA

• When a car starts suddenly , the passenger bends backward.
• when running horse stops suddenly , the rider bends forward.
• When a coat or blanket is beaten by a stick , the dust particles are removed.

FIRST LAW GIVES the definition of force.

FORCE - It is a external cause that forces the body to change its initial state of body.

NEWTON’S SECOND LAW

The rate of change in momentum of a body is directly proportional to the applied force on the body and takes place in direction of force.

NEWTON’S SECOND LAW GIVES THE MAGNITUDE OF FORCE.

NEWTON’S FIRST LAW CONTAINED IN THE SECOND LAW.

NEWTON’S THIRD LAW

To every action there is equal and opposite reaction.

FOR INSTANCE

• Recoil of a gun.
• Motion of a rocket.
• Swimming
• while drawing water from well.

Answer 2

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Newton gave three laws of motion which are ,

$\underline{\green{\bf{\dag Newton's\: First\:Law\:of\: Motion:}}}$

Newton's first law of motion states that an object remains in state of rest or in uniform motion unless compelled by an external unbalanced force.

This law is also known as law of inertia.

For example -

❒ If we kick a ball in space it will keep going for ever since there is no gravity no friction .

❒ A person standing in a moving bus tends to fall in forward direction due to inertia of motion.

❒ When we hit a pile of coins in carrom board striker the coin at the bottom gets displaced while the others fall on the same position due to inertia of rest.

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$\underline{\green{\bf{\dag Newton's\: Second\:Law\:of\: Motion:}}}$

Newton's second law of motion states that the rate of change of momentum is directly proportional to the applied force in the direction of the force.

For example -

❒ If we push the car and truck with same force , the car will have a Greater acceleration than the truck since it has less mass.

❒ It is easier to lift empty bucket than a bucket filled with water since the empty bucket has less than that of filled with water.

$\rule{200}2$

$\underline{\green{\bf{\dag Newton's\: Third\:Law\:of\: Motion:}}}$

Newton's third law state that every action has an equal and opposite reaction.

For example -

❒ When a person fires bullet from his gun , he experiences backward jek due to the equal and opposite force applied by the bullet.

❒ We are able to work on the ground because when we apply a force on the ground while walking the ground also applies the same equal force and enables us walk .

❒ When we jump out of the boat the boat also moves backward.