Name a machine which can be used to :
change the direction of force applied.

Explanation

To solve the question, we need to identify a machine that can change the direction of the force applied. The machine we will focus on is the single fixed pulley.

### Step-by-Step Solution:

1. **Understanding the Concept**:
- A machine that changes the direction of force allows us to apply force in one direction while the load moves in another direction.

2. **Identifying the Machine**:
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