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A small 250-gram ball on the end of a thin, light rod is rotated in a...

A small 250-gram ball on the end of a thin, light rod is rotated in a horizontal circle of radius 1.2 m .

Part A

Calculate the moment of inertia of the ball about the center of the circle.

Express your answer to two significant figures and include the appropriate units.
I =

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Part B

Calculate the torque needed to keep the ball rotating at constant angular velocity if air resistance exerts a force of 0.028 N on the ball. Ignore air resistance on the rod and its moment of inertia.
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Answer #1

mass of the ball-250g-250x10-kg, radius of the horizontal circle= 1.2m partA moment of inertia of the ball about the centre o

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