A small electric motor is fixed on a bench, as illustrated. It is supplied with $6.0\text{ V}$ and the current in the motor is $0.50\text{ A}$. The motor has an efficiency of 50%. What time is needed to raise a mass of $200\text{ g}$ through a height of $90\text{ cm}$?
- A$0.59\text{ s}$
- B$0.85\text{ s}$
- C$1.2\text{ s}$
- D$2.7\text{ s}$