Assertion: Friction is a force which acts in the direction of motion of a body. Reason: Polishing a surface reduces friction of the surface.
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Answer:
assertion (A)is false but reason (R)is true
Explanation:
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The Assertion (A) is false but Reason (R) is true.
Explanation:
- Friction is a force that acts opposite to the direction of motion of the body since it is a resistive force.
- There are two types of friction: Static friction and Kinetic friction.
- The force that emerges during friction is known as frictional force.
- Static friction works when two surfaces are not moving relative to each other, while kinetic friction acts when the two objects are in motion.
- Generally, friction is caused due to irregularities in the body's surface.
- Therefore, polishing a surface reduces the friction of the surface.
- If we polish it beyond a certain limit, then it may increase the frictional force of the body.
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