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A flat uniform circular disk (radius = 2...

A flat uniform circular disk (radius = 2.00 m, `"mass" = 1.00 xx 10^(2)` kg) is initially stationary. The disk is free to rotate in the horizontal plane about a frictionless axis perpendic ular to the center of the disk. A 40.0-kg person, standing 1.25 m from the axis, begins to run on the disk in a circular path and has a tangential speed of `2.00 m//s` relative to the ground. Find the resulting angular speed of the disk (in `"rad"//s`) and describe the direction of the rotation.

A

`0.500 "rad"//s`

B

`0.250 "rad"//s`

C

`2.00 "rad"//s`

D

`1.00 "rad"//s`

Text Solution

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The correct Answer is:
A
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