STATEMENT-1
It is easier to pull a heavy object than to push it on a level ground.
and
STATEMENT-2
The magnitude of frictional force depends on the nature of the two surfaces in contact.
It is easier to pull a heavy object than to push it on a level ground.
and
STATEMENT-2
The magnitude of frictional force depends on the nature of the two surfaces in contact.
- (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: When pulling, the vertical component of applied force reduces the normal force, thus reducing friction. When pushing, the vertical component increases the normal force, increasing friction.
STATEMENT-2 is true: Friction does depend on the nature of surfaces in contact (coefficient of friction).
However, STATEMENT-2 does not explain STATEMENT-1. The reason pulling is easier than pushing is due to the change in normal force, not the nature of surfaces.
STATEMENT-2 is true: Friction does depend on the nature of surfaces in contact (coefficient of friction).
However, STATEMENT-2 does not explain STATEMENT-1. The reason pulling is easier than pushing is due to the change in normal force, not the nature of surfaces.
JEE Advanced · 2008 · 13 Apr 2008 · Paper 2 · Single correct option