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The moment of inertia of a body about a given axis is 1.2kgm2,Initially, the body is at rest. In order to produce a rotational kinetic energy of 1500J,an angular acceleration of 25 rad s- 2 must be applied about that axis for a duration of
detailed solution
Correct option is B
E=12Iω2 or 1500=12×1⋅2×ω2∴ ω2=30001⋅2=2500 or ω=50rad/secnow, t=ωα=5025=2secTalk to our academic expert!
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Three point masses, each of m, are placed at the corners of an equilateral triangle of side l. Then the moment of inertia of this system about an axis along one side of the triangle is
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