토크 \( T = \frac{P}{\omega} \), 
여기서 \( P = 3 \, \text{kW} = 3000 \, \text{W} \), 
\( \omega = \frac{2\pi \cdot 1500}{60} = 157.08 \, \text{rad/s} \)
\(T = \frac{3000}{157.08} \approx 19.1 \, \text{Nm} \), 
\( 1 \, \text{Nm} \approx 0.102 \, \text{kgm} \)이므로 
\( T \approx 1.95 \, \text{kgm} \), 

약 2로 정답 ①번.