Question

WRITE ABOUT THE NEWTONS LAW​

Answer 1

Answer:

LAWS OF MOTION

newton's First Law of Motion

The first law of motion states that:

An object remains in a state of rest or of uniform motion in a straight line unless an external force (i.e. unbalanced force) acts upon it.

 All objects resist any change in their state of rest or uniform motion.

 This tendency is inertia. This law is also known as l aw of inertia.

Inertia

Tendency of an object to resist any change in its state of rest or of uniform motion is called

inertia.

TYPES OF INERTIA

• Inertia of rest

• Inertia of motion

• Inertia of direction

Inertia of a body depends upon its mass.

•  Massive objects have more inertia

•  Lighter objects have less inertia.

MOMENTUM

“An object in motion has momentum “

Momentum is defined as the product of mass and velocity of an object.

If m = mass of an object

v = velocity of the object momentum (p) = mass (m) x velocity (v)

p = mv

•  Momentum is a vector quantity i.e. it has both magnitude and direction

•  Direction of momentum is same as that of direction of velocity.

•  S.I unit of momentum is kg m/s

• If the body is at rest, its velocity = 0, therefore p = 0

Newton's Second Law of Motion

The second law of motion states that the rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of force.

Change in linear momentum∝ force applied

              Time taken

One Newton: One Newton force is defined as the amount of force that produces an acceleration of 1 m/s2 in an object of 1 kg mass.

1 N = 1 kg x 1 m/s2

The second law of motion gives us a method to measure the force acting on an object as a product of its mass and acceleration.

Newton's Third Law of Motion

The third law of motion states that when one object exerts a force on another object, the second object instantaneously exerts a force back on the first.

In other words, “To every action there is always an equal and opposite reaction".

•  The two forces are always equal in magnitude but opposite in direction.

•  It is also called the law of action and reaction force

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