Show that the rate of change of momentum = mass x acceleration. Under what condition does this relation hold?

Explanation

To show that the rate of change of momentum is equal to mass times acceleration, we can follow these steps:

### Step-by-Step Solution:

1. **Define Momentum**:
The momentum \( p \) of an object is defined as the product of its mass \( m \) and its velocity \( v \):
\[
p = m \cdot v
...