Laws of Motion

First law

Newton’s first law of motion states that every object in the universe continues to be in its state of rest or uniform motion in a straight line, unless it is compelled to change its state by some external force. This law can be sub-divided into two sub-laws. (i) A body at rest continues to remain ....Read More


Newton’s law of universal gravitation states that, in this entire Universe every mass attracts every other mass towards itself with a force directly proportional to the product of the magnitude of masses and inversely proportional to the square of the distance between the centres of masses. The va ....Read More

Second law

The impact of motion produced by a body depends on its mass and velocity. The instantaneous force which a body possesses due to combined effect of mass and velocity is known as linear momentum. Linear momentum is the product of mass and velocity. It is a vector quantity and acts in the direction of ....Read More

Third law

Newton’s third law of motion states that to every action there is an equal and opposite reaction. Action and reaction forces are equal and opposite but they do not cancel each other. This is because action and reaction forces act on different objects. So, this law is applicable only when two diffe ....Read More

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