Question:
The friction forces existing between the surfaces in relative motion is known as
The friction forces existing between the surfaces in relative motion is known as
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Static friction acts before motion starts, while kinetic friction acts when surfaces are in relative motion.
Updated On: May 4, 2026
- Static friction
- Angle of Repose
- Kinetic friction
- Rolling resistance
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The Correct Option is C
Solution and Explanation
Step 1: Friction is the resisting force that acts between two surfaces in contact.
Step 2: If two surfaces are not moving relative to each other, the friction is called static friction.
Step 3: If two surfaces are moving or sliding relative to each other, the friction is called kinetic friction.
Step 4: The question clearly says that the surfaces are in relative motion.
Step 5: Therefore, the friction force acting between moving surfaces is kinetic friction. \[ \boxed{\text{Kinetic friction}} \]
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