Define force . Given its unit

Explanation

### Step-by-Step Solution:

**Step 1: Define Force**
- Force is defined as an external push or pull that changes or tends to change the state of motion of a body, or deforms a body. According to Newton's first law of motion, a body at rest will remain at rest, and a body in motion will continue in motion unless acted upon by an external force.

**Step 2: Explain the Effects of Force**
- When a force is applied to a body, it can:
- Change the state of motion (e.g., bringing a stationary object into motion).
...