Newton’s 3 Laws of Motion

NEWTON’S FIRST LAW OF MOTION

Newton’s First Law of Motion states that an object will continue to remain at rest or uniform motion unless acted upon by an external unbalanced force.
Let us consider an object at rest, like this ball. This ball will not move unless some kind of force acts on it, proving Newton’s law. Newton’s law also states that this ball will continue to stay in a state of constant speed in the absence of an unbalanced force. This is hard for us to understand, as in human existence, we have always seen and believed that a moving ball will ultimately come to rest. The reason this happens is because there is an unbalanced force called the force of friction acting on the ball, making it stop. In the absence of frictional force or any other unbalanced force, this ball will continue to move with constant velocity, proving the second part of Newton’s First Law of Motion.
NEWTON’S SECOND LAW OF MOTION

Newton’s 2nd law states that the rate of change of momentum of an object is directly proportional to the unbalanced force in the direction of force. It states that force is equal to mass times acceleration.
If Newton applies force on a rock, the force applied by him causes the rock to move only slightly. Now, if the horse applies force on the same rock, the rock moves faster, i.e. more acceleration is produced. This is because the force applied by the horse is more than Newton. Hence, force is proportional to acceleration.
Oh! Mr. Smart is trying to keep Newton and the horse apart. He is applying equal force on both. However, as compared to the horse, the mass of Newton is comparatively lesser. So, Mr. Smart finds it easier to keep Newton away as compared to the horse. Thus, Force is proportional to mass. Hence, we can conclude from the two cases that force is directly proportional to the product of mass and acceleration.
NEWTON’S THIRD LAW OF MOTION

Newton’s Third Law of motion states that for every action, there is an equal and opposite reaction.
When we sit on a chair, our body exerts a downward force on the chair. This force is called action. The chair also exerts an upward force on our body. This force is opposite to the downward force. This is known as reaction. If the chair would not have exerted a force, the chair would collapse and we would never be able to sit on a chair.
Do you know that Newton’s Thirds law also helps birds to fly. When a bird is flying in the air, its wings exert a downward force on the air. Similarly, the air also exerts an equal and opposite force which pushes the bird upwards. This action- reaction combination helps birds to fly in the air.