Physics
Grade-9
Easy
Question
Which frictional force is known as a self-adjusting force?
- Static friction
- Sliding friction
- Rolling friction
- Fluid friction
Hint:
The static force adjusts its magnitude with an increase in the magnitude of the applied force.
The correct answer is: Static friction
Static frictional force is a self-adjusting force.
- The static frictional force limits the magnitude of the applied external force by counterbalancing.
- This, frictional force equals the magnitude of the external force, until it surpasses the threshold of relative motion.
- As the magnitude of the applied force increase, the magnitude of the static friction increases.
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