A body with mass $50\,\text{kg}$ increases its velocity from $2.0\,\text{m s}^{-1}$ to $10\,\text{m s}^{-1}$ along the same line. What impulse is needed to produce this acceleration?
- A$250\,\text{N s}$
- B$400\,\text{N s}$
- C$850\,\text{N s}$
- D$2500\,\text{N s}$