A weight `W` rests on a rough horizontal plane,If the angle of friction is `theta`,the least force that can move the body along the plane will be

Explanation

To solve the problem of finding the least force that can move a weight \( W \) resting on a rough horizontal plane when the angle of friction is \( \theta \), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Forces Acting on the Block**:
- The weight \( W \) acts vertically downward.
- The normal reaction force \( R \) acts vertically upward from the surface.
- The frictional force \( f \) acts parallel to the surface in the opposite direction of the applied force.
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