Physics
Assertion (A) : A swimmer pushes the water backward to move forward in a swimming pool.
Reason (R) : Water exerts a greater but opposite force on the swimmer, helping him to move forward.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Motion in One Dimension
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Answer
assertion is true but reason is false
Explanation
Assertion (A) is true because when a swimmer wants to move forward in water, he pushes the water backward using his hands and feet which is an action force so according to Newton’s third law of motion : "for every action, there is an equal and opposite reaction", the water pushes back on the swimmer with an equal force in the opposite (forward) direction. This reaction force is what actually propels the swimmer forward.
Reason (R) is false because water exerts an equal and opposite force (not greater), according to Newton’s third law of motion.
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