Man Climbing a Rope – Rankers Physics

Friction: Practice Problem & Solution

Assertion (A): When a man climbs the rope friction force acts in downward direction. Reason (R): Friction force opposes relative motion or tendency of relative motion between two contact surfaces.  
(1) Both (A) & (R) are true and the (R) is the correct explanation of the (A)
(2) Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(3) (A) is true but (R) is false
(4) Both (A) and (R) are false

Solution Explained:

To solve this problem, we apply the core principles of Friction. Understanding the underlying formula is key to arriving at the correct answer below:

When a man climbs up, his hands exert a downward friction force on the rope. So (A) is true (referring to friction on the rope). (R) is the correct definition of friction and explains why this force acts.

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Similar Practice Questions

Explore conceptually related problems to test your knowledge.

1. The value of frictional force on block in the given diagram is (Take g = 10 m/s²)
2. Assertion (A): Two smooth blocks are kept on a smooth inclined plane such that one block is kept over other. When a force is applied on upper block acceleration of lower block is unaffected. Reason (R): Acceleration of a block on smooth inclined plane is \(g sin(\theta)\).
3. A body in equilibrium will not have :
4. If block is at verge of motion, then select the correct option (where μ is the coefficient of friction)
5. A block of mass M is placed on a fixed smooth inclined plane of inclination 'A' with the horizontal is at rest. The force exerted by the plane on the block has a magnitude: