STATEMENT-1
A cloth covers a table. Some dishes are kept on it. The cloth can be pulled out without dislodging the dishes from the table.
because
STATEMENT-2
For every action there is an equal and opposite reaction.
A cloth covers a table. Some dishes are kept on it. The cloth can be pulled out without dislodging the dishes from the table.
because
STATEMENT-2
For every action there is an equal and opposite reaction.
- (A)Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1
- (B)Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1✓ Correct
- (C)Statement-1 is True, Statement-2 is False
- (D)Statement-1 is False, Statement-2 is True
Answer: (B)
Solution
Statement-1 is TRUE: This is the classic tablecloth trick, which works due to inertia. When the cloth is pulled quickly, the friction force acts for a very short time, and the impulse (force × time) is insufficient to significantly accelerate the dishes. The dishes tend to remain at rest due to their inertia.
Statement-2 is TRUE: This is Newton's third law of motion.
However, Statement-2 is NOT a correct explanation for Statement-1. The tablecloth trick is explained by inertia (Newton's first law), not by action-reaction pairs. The action-reaction forces (friction on cloth by dish and friction on dish by cloth) are equal and opposite, but this doesn't explain why the dishes don't move.
Therefore, the answer is (B).
Statement-2 is TRUE: This is Newton's third law of motion.
However, Statement-2 is NOT a correct explanation for Statement-1. The tablecloth trick is explained by inertia (Newton's first law), not by action-reaction pairs. The action-reaction forces (friction on cloth by dish and friction on dish by cloth) are equal and opposite, but this doesn't explain why the dishes don't move.
Therefore, the answer is (B).
JEE Advanced · 2007 · 08 Apr 2007 · Paper 2 · Single correct option