MCQ
Two identical masses are connected to a horizontal thin (massless) rod as shown in the figure. When their distance from the pivot is $D$, a torque $\tau$ produces an angular acceleration of $\alpha_1$. The masses are now repositioned so that they are 2 D from the pivot. The same torque produces an angular acceleration $\alpha_2$ which is given by ______
- A$\alpha_2=\alpha_1$
- B$\alpha_2=1 / 2 \text { alpha_ } 1$
- C$\alpha_2=4 \alpha_1$
- ✓$\alpha_2=1 / 4 a_1$