Question

Explain Newton's first law of motion with the help of three examples​

Answer 1

Newton's First Law of Motion, otherwise known as Galileo's Law of Inertia, states that a body at rest or uniform motion will continue to be at rest or uniform motion until and unless a net external force acts on it.

There are two conditions on which the 1st law of motion is dependent:

• Objects at rest: When an object is at rest velocity (v= 0) and acceleration (a = 0) are zero. Therefore, the object continues to be at rest.
• Objects in motion: When an object is in motion, velocity is not equal to zero (v ≠ 0) while acceleration (a = 0) is equal to zero. Therefore, the object will continue to be in motion with constant velocity and in the same direction.

Some of the many examples of inertia around us include:  

• Assume a person is in a car. When the car is in motion, so is the person. But when the car suddenly hits the breaks, the person lounges further in the forward direction. This is because of the sudden transition of the car form motion to rest, but the body of the person continues to be in motion. Which is why he moves further and gets severe injuries. Seatbelts work on the principle of the Second Law of Motion to prevent this.  
• Luggage is not kept on the roof of a bus or a van without tying it up. An explanation for this is: when the bus is at rest, the luggage will also be at rest. But when the bus starts moving, that is, it is subjected to a state of motion, then the luggage will prefer to stay in its state of rest, and hence, fall off to the backside of the bus. However, assuming that the bus is already in motion, the luggage will also be in motion. But when brakes are applied to the bus, that is, it is subjected to a state of rest, then the luggage will prefer to stay in its state of motion, and hence, fall off the bus via its front. Hence, ropes are used to securely bind the luggage to the roof of the bus, therefore, preventing them from falling off the bus.
• By beating a dusty carpet with a stick, the dust particles come out. This is because when the carpet is at rest, so is the dust. But when the carpet is beaten with a stick, it is suddenly subjected to motion. The dust particles, however, tend to remain at rest and hence come out of the carpet.

Answer 2

The laws are: (1) Every object moves in a straight line unless acted upon by a force. (2) The acceleration of an object is directly proportional to the net force exerted and inversely proportional to the object's mass. (3) For every action, there is an equal and opposite reaction.

HOPE IT HELPS

PLEASE MARK ME BRAINLIEST ☺️