Question
A circular platform is free to rotate in a horizontal plane about a vertical axis passing through its center. A tortoise is sitting at the edge of the platform. Now, the platform is given an angular velocity ω0. When the tortoise moves along a chord of the platform with a constant velocity (with respect to the platform), the angular velocity of the platform ω(t) will vary with time t as
Answer: Option A
:
B
The angular momentum (L) of the system is conserved i.e. L = Iω = constant
When the tortoise walks along a chord, it first moves closer to the centre and then away from the centre. Hence, M.I. first decreases and then increases. As a result, ω will firstincrease and then decrease. Also the change in ωwill be non-linear function of time.
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:
B
The angular momentum (L) of the system is conserved i.e. L = Iω = constant
When the tortoise walks along a chord, it first moves closer to the centre and then away from the centre. Hence, M.I. first decreases and then increases. As a result, ω will firstincrease and then decrease. Also the change in ωwill be non-linear function of time.
Was this answer helpful ?
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