The direction of force of friction is always ___to the direction of motion.

Options

A. Same
B. Opposite
C. Unchanged
D. None of these

Explanation

To answer the question, "The direction of force of friction is always ___ to the direction of motion," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Friction**: Friction is a force that opposes the relative motion of two surfaces in contact. It acts when there is an attempt to move one surface over another.

2. **Identifying the Direction of Motion**: When an object is in motion, it moves in a specific direction. For example, if an object is sliding to the right, the direction of motion is to the right.

3. **Analyzing the Role of Friction**: The force of friction acts to resist this motion. Therefore, if the object is moving to the right, the frictional force will act to the left.

4. **Conclusion**: Since friction always acts in the opposite direction to the direction of motion, we can conclude that the direction of the force of friction is always opposite to the direction of motion.

### Final Answer:
The direction of force of friction is always **opposite** to the direction of motion.

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