Impending motion is opposed by:
Show Hint
- Static friction
- Fluid friction
- Sliding friction
- Kinetic friction
- Rolling friction
The Correct Option is A
Solution and Explanation
When an object is at rest and there is an attempt to move it, the frictional force that opposes the initiation of motion is called static friction.
Static friction prevents the object from moving until a certain threshold force is applied. Once the object starts moving, static friction is replaced by kinetic (or dynamic) friction, which is generally smaller than static friction.
Explanation of other options:
- (B) Fluid friction: This type of friction occurs when an object moves through a fluid (liquid or gas), not when an object is stationary.
- (C) Sliding friction: This is the friction between two objects in relative motion to each other.
- (D) Kinetic friction: This type of friction opposes the motion of objects that are already in motion.
- (E) Rolling friction: This friction occurs when an object rolls over a surface, typically smaller than sliding friction.
Thus, the correct answer is option (A), static friction.
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