A body that is at rest or in uniform motion tends to remain in the same state unless external energy is applied to it is called ‘Inertia’.
- The inertia of rest - Inertia of motion- Inertia of direction.
3 Types of Inertia
The external cause of push or pull that:- Produces motion in a body that is at rest.- Brings a body to rest which is moving, or- Changes the direction of motion of abody
Definition of Force:
“A body continues in its state of rest or of uniform motion in a straight line unless some external force is applied to it to change that state.”
Newton’s First Law of Motion:
“The acceleration produced in a body due an external force, is directly proportional to the force and inversely proportional to the mass of the body.”Mathematically, a = F/m or F = m a
"It states that For every action on any object, there is an equal and opposite reaction".
Newton's Third Law:
The product of mass of the body and its velocity is called 'linear momentum'.Mathematically, p = m v
Linear Momentum:
A force acting for a short duration of time is called "Impulsive force".
Impulsive Force:
In an isolated system of particles, the total momentum is conserved. For eg: recoiling of a gun.
Law of Conservation of Momentum:
For two surfaces or bodies that are in contact with each other, friction is a force that opposes the relative motion between two bodies.
Friction:
It is the force acting on a body that is in uniform circular motion. It acts along the radius of the circle and towards its center.
Centripetal Force:
It is a pseudo force acting on a body that is in circular motion. It acts along the radius and away from its center.
Centrifugal Force:
Hope you have learnt some important things about Newton's Laws. Let your friends also know about it.