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Rotational Motion question

2004 · Q147
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Rotational Motion question

2004 · Q147

NEETPhysicsRotational MotionMCQ+4 / −1
Three particles, each of mass m gram, are situated at the vertices of an equilateral triangle ABC of side lll cm (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram-cm2 units will be

AIPMT 2004 Physics - Rotational Motion Question 38 English
  1. A
    34{3 \over 4}43​mlll2
  2. B
    2mlll2
  3. C
    54{5 \over 4}45​mlll2
  4. D
    32{3 \over 2}23​mlll2
View written solutionFree

Correct answer: C

AIPMT 2004 Physics - Rotational Motion Question 38 English Explanation

IAX = m(AB)2 + m(OC)2
= mlll2 + m (lll cos 60º)2
= mlll2 + mlll2/4 = 5/4 mlll2

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