Newtons 1 Law

Introduction to Newtons 1st law of motion:-
Sir Isaac Newton formulated the three laws of motion, which have helped us in the development of science and technology in many fold ways, as they serve as the basic principals on which further laws and studies were advanced. I like to share this First Law of Thermodynamics Definition with you all through my article.

The fist law of motion states that an object at rest will remain in its state of rest , and an object in motion will remain in its state of uniform motion unless compelled to change its state of rest or of uniform motion by an external agency.

Explanation on Newtons first Law of Motion:

The above law implies that an object, if at rest, can not automatically start moving without the application of force on it. Similarly, if an object is in a state of uniform motion, it will neither stop moving nor change its state of uniform motion to a non uniform one without the action of a force on it. This can be summarized to say that an object at a constant velocity will not change its velocity unless acted upon by some force, and if that velocity is zero, then the object will remain at rest. The first law of motion describes the property of inertia. Inertia is the property of all objects, by virtue of which, they tend to adhere to their current state of uniform motion or of rest under the compulsion of an external force, and only change their current state when that compulsive force overcomes their resistance. This resistance of all bodies against change in their current state of rest or of uniform motion is called inertia. Thus, from the first law, we come to know that only “force” is the factor that changes a body's state of motion, and that uniform motion and rest are not different from each other on the basis of force. Please express your views of this topic Projectile Motion Equation by commenting on blog.

Questions on Newtons first Law of Motion:

Since the first law of newton does not provide a direct formula and it explains the concept of inertia, there are many day to day phenomenon that implement this law. One should be able to explain the application of the Newton's first law in such theoretical questions. Some examples are given as follows:-

When breaks are applied suddenly in a moving vehicle, why are the passengers thrown forwards?

Answer:- The initial state of motion of the vehicle and the passengers in it is that of uniform motion in a straight line. When breaks are suddenly applied on the vehicle, the passengers tend to resist the change in their state of motion, and in in effort of doing so, the passenger's bodies keep on moving forward, and so when the vehicle stops, the passengers get thrown forwards. This is an example of inertia exhibited by the passenger's bodies.

Why does a cyclist have to bend inwards while taking a turn?

Answer:- Before taking the turn, the direction of motion of the cyclist is different. When the handle of the cycle is turned, the cycle and the cyclist's body tend to move in their original path, that is, they oppose the change in direction of motion due to inertia. In this situation, the cyclist can fall off the cycle. To prevent this, the cyclist puts his/her weight inwards in the direction of the turn.

Why do we feel dizzy if we move round and round for some time and them come to a stop?

Answer:- This is because the eyes and the fluid in the ears that maintains the balance of our body both are in motion with the body in its rotatory motion. When the person stops rotating suddenly, the eyes and the fluid does not stop as fast and they tend to be in the rotatory motion due to the property of inertia. Thus, one loses the balance of the body and feels dizzy as the vision swirls. Note:- DO NOT try this as it can cause serious injury.