Name the form of mechanical energy, which is put to use for doing work.

Explanation

**Step-by-Step Solution:**

1. **Understanding Mechanical Energy**: Mechanical energy is the sum of potential energy and kinetic energy in an object. It is the energy associated with the motion and position of an object.

2. **Identifying Forms of Mechanical Energy**: The two primary forms of mechanical energy are:
- **Potential Energy**: Energy stored in an object due to its position or configuration.
- **Kinetic Energy**: Energy an object possesses due to its motion.

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