Laws Of

Motion... Made By:

Nehil Bhakta

Laws of motion

1st Law of Motion

2nd Law of Motion

3rd Law of motion

The first law of motion states that an object at rest will remain at rest. And an object will continue moving unless acted upon by an outside force. This law is also known as inertia.

First Law of MotionA body at rest or in motion will remain at rest or in uniform motion unless some outside force is applied to it. Often referred to as the law of inertia”. E.g.: pushing of a box

This pumpkins will not move until and unless the external unbalance force is applied to it

Inertia: Inertia is the resistance an object has to a change in its state of motion. Mass: mass is a property of a physical body. It is a measure of an object's resistance to acceleration when a force is applied

Mass and Inertia

The bowling ball needs more force to move because it has more mass

therefore more Inertia

InertiaInertia is the resistance ofany physical object to any change in its state of motion. It is the tendency of objects to keep moving in a straight line at constant velocity. The principle of inertia is one of the fundamental principles of classical physics that are used to describe the motion of objects and how they are affected by applied

forces.

Types of Inertia

1 inertia of moti0n

2 Inertia of rest

3 inertia of direction

Inertia of Motion

 E.g.: When a moving car suddenly stops the person sitting in the car falls forward because the lower portion of the body in contact with the car comes to rest whereas the upper part tends to remain in motion due to inertia of motion.

Inertia of Rest

 E.g.: Person sitting in a car falls backwards, when the car suddenly starts. It is because the lower portion in contact with the car comes in motion where as the upper part tries to remain at rest due to inertia of rest.

Inertia of Direction

E.g.: When a car moves round a curve the person sitting inside is thrown outwards in order to maintain his direction of motion due to inertia of motion.

Massmass is a property of a physical body. It is a measure of an object's resistance to acceleration when a force is applied. It also determines the strength of its mutual gravitational attraction to other bodies. In the theory of relativity a related concept is the mass–energy content of a system. The SI unit of mass is the kilogram

In an inertial reference frame, the vector sum of the forces F on an object is equal to the mass m of that object multiplied by the acceleration vector a of the object: F = ma.

Second Law of Motion

E.g.: The Big Rock Requires more force to move but the small stone needs less force due to its less mass

When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body is known as Third law of motion