NEET Physics Friction MCQ Question
Consider a diagram showing a block at rest on a horizontal surface. The block experiences a downward gravitational force and an upward normal force. If an external force is applied horizontally but the block does not move, which force opposes the applied force and prevents motion?
Static friction
Rolling friction
Kinetic friction
Normal force
Correct Answer
Detailed Explanation
The block does not move because static friction opposes the applied force up to its maximum limit, as stated in the static friction law f s ≤ μ s N.
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