State Newton’s second law of motion. How does it help to measure force? Also state the units of force.

Explanation

### Step-by-Step Solution:

1. **State Newton's Second Law of Motion**:
Newton's second law of motion states that the force \( F \) applied to an object is directly proportional to the rate of change of its momentum \( p \). Mathematically, this can be expressed as:
\[ F \propto \frac{dp}{dt} \]
where \( \frac{dp}{dt} \) is the rate of change of momentum with respect to time.
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