The work done on a machine is called _____ .

Explanation

**Step-by-Step Solution:**

1. **Understanding the Concept of Work Done on a Machine:**
- When we operate a machine, we need to exert some force or energy to make it function. This process involves doing work on the machine.

2. **Identifying the Type of Work Done:**
- The work that we do on the machine is essentially the energy we provide to it. This energy is necessary for the machine to perform its intended function.

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