JEE Advanced 2021 Full Test 5 Paper 1

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(One or More than one correct type)
This section contains 06 multiple choice questions. Each question has FOUR options (A), (B), (C) and (D). ONE OR MORE THAN ONE of these four options is(are) correct.

Question : 9 of 54

Marks: +1, -0

A horizontal square platform of mass m and side a is free to rotate about a vertical axis passing through its centre O. The platform is stationary and a person of the same mass (m) as the platform is standing on it at point A. The person now starts walking along the edge from A to B (see figure). The speed v of the person with respect to the platform is constant. Taking v = 5 m/s and a = 1m.

Angular velocity of platform when the person is at A is 6 rad/s.
Angular velocity of platform increases first and then decreases again as it reaches B.
Angular velocity of platform decreases first and then increases again as it reaches B.
Angular velocity of platform remains constant as the person goes from A to B.

Validate

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