Question

If there's a friction between shaft and pulley, will the system have a greater or lesser acceleration than when it has no friction?

Answer 1

Answer:

Well Friction is a retarding force, therefore, acceleration will be greater when there will be no friction.

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Answer 2

Answer:

System will have lesser acceleration in presence of friction.

Explanation:

Friction always reduces the acceleration in comparison to the condition when there is no friction.

Friction always acts in the direction opposite to motion and hence decreases the acceleration of the body in motion.

Hence, When friction is present between the shaft and pulley, the system will have a lesser acceleration compared to the condition when it has no friction.