Rotational Motion Question 57
Question: Three particles, each of mass m grams situated at the vertices of an equilateral triangle ABC of side 1 cm . The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram units will be:
[AIPMT (S) 2004]
Options:
A)
B)
C)
D)
Show Answer
Answer:
Correct Answer: C
Solution:
- Moment of inertia of the system about AX is given by
Alternative: Moment of inertia of a system about a line OC perpendicular to AB, in the plane of ABC is
According to parallel-axis theorem
where