Answer true or false:
If the efficiency of a machine is 100%, the mechanical advantage equals the velocity ratio.

Explanation

To determine whether the statement "If the efficiency of a machine is 100%, the mechanical advantage equals the velocity ratio" is true or false, we can follow these steps:

### Step 1: Understand the Definitions
- **Efficiency (η)** of a machine is defined as the ratio of useful work output to the total work input, usually expressed as a percentage.
- **Mechanical Advantage (MA)** is the ratio of the output force produced by the machine to the input force applied.
- **Velocity Ratio (VR)** is the ratio of the distance moved by the effort (input distance) to the distance moved by the load (output distance).

### Step 2: Analyze the Condition of 100% Efficiency
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