Question

A dumbbell has a length of 2.3 m and all of its mass can be considered to be at the ends. It has a mass of 2.1 kg at one end and 6.5 kg at the other end. It is rotating about an axis which is

perpendicular to its length at a point 1.4 m from the heavier end (6.5 kg). It is rotating in the cw direction at 3.5 rev/min at t = 0. At t = 5.3 s it is rotating at 2.3 rev/min in the counter clockwise direction. What is its moment of inertia? What is its angular acceleration? What is the torque on it? What is its angular momentum at t = 3.0 s?

Answer #1

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I want only final answer
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rotates in a horizontal plane about a fixed axis through its center
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initially held by catches at positions a distance
5.50×10−2 m on each side from the center of the rod, and
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I=
1
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M l2
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I =...

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