Published by:
CGP EDU Academic Team
Published on: September 12, 2026
The wheel shown in the figure is fixed at ‘O’ and is in contact with a rough surface as shown. The wheel rotates with an angular velocity
. What is the direction and nature of friction force on the wheel and on the ground.

Text Solution
Verified by ExpertsThe correct answer is:
A
Step 1: Identify the direction of motion of the wheel. The wheel rotates counterclockwise and the point of contact with the ground tends to move backward.
Step 2: Understand that friction opposes relative motion. Therefore, the friction force on the wheel acts forward, trying to prevent the backward slipping.
Step 3: For the surface, there is a reaction force acting downwards due to the weight of the wheel, and the friction force on the ground acts in the opposite direction to that on the wheel (backward) because it opposes the tendency of the wheel to slip.
Therefore, the friction force on the wheel is forward, while the friction force on the ground is backward.
Step 2: Understand that friction opposes relative motion. Therefore, the friction force on the wheel acts forward, trying to prevent the backward slipping.
Step 3: For the surface, there is a reaction force acting downwards due to the weight of the wheel, and the friction force on the ground acts in the opposite direction to that on the wheel (backward) because it opposes the tendency of the wheel to slip.
Therefore, the friction force on the wheel is forward, while the friction force on the ground is backward.
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