A block of mass m is pulled slowly by a minimum constant force on a rough (`mu`) horizontal surface through a distance x. Find work done by force F.

Explanation

To solve the problem of finding the work done by a constant force \( F \) pulling a block of mass \( m \) on a rough horizontal surface with a coefficient of friction \( \mu \) through a distance \( x \), we can follow these steps:

### Step 1: Identify the Forces Acting on the Block
- The forces acting on the block include:
- The gravitational force \( mg \) acting downward.
- The normal force \( N \) acting upward.
- The applied force \( F \) acting at an angle \( \theta \) to the horizontal.
- The frictional force \( f \) acting opposite to the direction of motion.
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