Question

Assertion (A): When a person swims, he pushes the water in the same direction as his motion.
Reason (R): Both action and reaction act on the same body.

• A. A and R are true and R is the correct explanation of A.
• B. A and R are true, but R is not the correct explanation of A.
• C. A is true but R is false.
• D. Both A and R are false.

Answer 1

The correct option is D

Both A and R are false.

Step 1: Explanation for the assertion statement

1. According to, Newton's third law, for every action, there will be an equal and opposite reaction.
2. When a person swims he pushes the water with his hands and feet in the opposite direction of his motion.
3. So, this acts as an active force.
4. This active force is applied by the person to the water.
5. Then there will be a reactive force acting on the person from that water, hence, he can move forward
6. So, when a person swims he pushes the water in opposite direction to the direction of motion.
7. So the assertion is false

Step 2: Explanation for the reason statement

1. According to Newton's third law of motion, for every action, there will be an equal and opposite reaction
2. These two forces (Action force and reactive force) act on different objects and not on the same object.
3. The object will be at rest if both forces act on the same object. because these forces will cancel each other and the total force will be zero.
4. So the reason given is false

Hence,

option (d) is correct.