Physics · Mechanics and Friction
Identify the FALSE statement regarding the laws of kinetic friction.
- 1The constant ratio that the magnitude of kinetic friction bears to the normal reaction is slightly greater than that in the case of limiting static friction.✓
- 2The magnitude of kinetic friction bears a constant ratio to the normal reaction between the two surfaces.
- 3For moderate speeds, the force of friction remains virtually constant, but it decreases slightly with a significant increase in speed.
- 4The force of friction always acts in a direction opposite to that in which the body is moving.
Correct answer
The constant ratio that the magnitude of kinetic friction bears to the normal reaction is slightly greater than that in the case of limiting static friction.
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