A ball is launched vertically downward with an initial velocity of $20\,\text{m s}^{-1}$. Air resistance may be neglected. What is the displacement from its starting position of the ball after $1.5\,\text{s}$?
- A$11\,\text{m}$
- B$19\,\text{m}$
- C$37\,\text{m}$
- D$41\,\text{m}$