The power $P$ needed to move an object through a medium at constant speed is determined by the speed $v$ and the resistive force $F$ acting on the object. The resistive force $F$ is also determined by the speed $v$. Which row gives a possible relationship between speed $v$, resistive force $F$ and power $P$?
- Aresistive force $F$ proportional to $v$, power $P$ constant
- Bresistive force $F$ proportional to $v$, power $P$ proportional to $v$
- Cresistive force $F$ proportional to $v^2$, power $P$ proportional to $v^2$
- Dresistive force $F$ proportional to $v^2$, power $P$ proportional to $v^3$