AIIMS2000Physics-Mechanics
AIIMS 2000 Physics Rotational Motion MCQ Question
Type: MCQ-numerical-Medium-Class 11
A rod of length 1.4 m and negligible mass has two masses of 0.3 kg and 0.7 kg tied to its two ends. Find the location of the point on this rod where the rotational energy is minimum when the rod is rotated about that point.
A
0.98 m from 0.3 kg
B
0.98 m from 0.7 kg
C
0.7 m from 0.3 kg
D
0.7 m from 0.7 kg
Correct Answer
Option A
Detailed Explanation
The point of minimum rotational energy is the center of mass. Calculating the center of mass for the system gives the location.
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