Newton law of motion

Newton (1642-1727) studied and developed Galileo’s (1564-1642) ideas about motion. He published his laws in a book in Latin “philosophies naturalist principia mathematica” which means, “the mathematical principals of natural philosophy”.

Newton’s First law of Motion:

“A body remains at rest or continues to move with constant velocity until an external force acts on the body”. This law is also called inertia.

Inertia:

“It is the property of the body, which opposes any change in its state of rest or motion”.The inertia of the body is directly proportional to the mass of the body. So the mass of the object is the quantitative measure of its inertia.

Frame of reference:

It is the space or surroundings according to which we make observation.

Example:

Laboratory or moving train.

Types of frame of references:

There are two types of frame of references.

•Inertial frame of reference

•Non-inertial frame of reference

Inertial frame of reference:

The non-accelerated frame of reference is called inertial frame of reference. Newton’s first law of motion is about non-accelerated objects.Earth is considered to be an internal frame of reference.

Non- inertial frame of reference:

The accelerated frame of reference is called non inertial frame of reference. Newton’s law of motion are not valid in this frame of reference.

Newton’s Second Law of Motion:

“When force is applied on a body, acceleration is produced in its direction. This acceleration is directly proportional to the applied force and inversely proportional to the mass of the body”.

Mathematically,

F = m ɑ

Unit of force:

The SI unit of force is called Newton’s. It is denoted by “N” and it is a derived unit.

Newton’s Third Law of Motion:

“Action and reaction are equal in magnitude but opposite in direction”.

When a body ‘A’ exerts a force on body ‘B’, is called the action of body ‘A’ on body ‘B’. The body ‘B’ exerts the force on body ‘A’ which is called reaction.Each force in action-reaction pair acts only on one of the two bodies, the action and reaction forces never act on the same body. View more on psalmfresh.blogspot.com for more educating and tricks article Thank you