Question

Swimming is possible on account of
(A). First law of motion
(B). Second law of motion
(C). Third law of motion
(D). Newton’s law of motion

Answer 1

Hint: First recall Newton’s laws of motion. Then compare all the laws of motion and recall some of their examples. Now relate the concept of all the laws with the concept of motion used by a swimmer. Finally you will be able to find out which law is applicable in case of swimming.

Complete answer:
When a swimmer swims in water, it experiences a force. This force is opposite to the direction of movement of the swimmer. In order to overcome this force, swimmers must stroke in downward direction to float in water and move forward. Both the forces applied by water and by swimmer are equal in magnitude and opposite in nature.
Thus, Swimming is possible on account of Newton’s third law of Motion.

ADDITIONAL INFORMATION:
Isaac Newton formed three physical laws that, together, laid the foundation for classical mechanics. They are known as Newton’s laws of motion. He used them to explain the motion of many physical objects and systems.
These laws relate a body with the forces acting upon it, and also the motion in response to those forces. These three laws can be expressed in different ways given as,

First law
First law of motion states that an object remains in the position of rest or in motion unless an external force is acted upon it.
Second law
According to the second law of motion, force applied depends on the mass of the body and its acceleration.
Third law
Third law of motion states that for every action force there is an equal reaction force which acts in the opposite direction.
NOTE: We can observe Newton's laws in day-to-day life situations. For example, the first law of motion can be observed when we get a jerk when the moving bus is suddenly stopped. Second law of motion can be observed when we ride a bicycle.