A coin placed on a rotating table just slips if it is placed at a distance 4 r from the centre. If we double the angular velocity of the table, then the coin will just slip when it is away from the centre at a distance equal to

Question

A coin placed on a rotating table just slips if it is placed at a distance 4 r from the centre. If we double the angular velocity of the table, then the coin will just slip when it is away from the centre at a distance equal to, 4 r, 2 r, r, r / 4

MARKS App · Accepted Answer

∴ ω = µ g r ∴ ω ∝ 1 r ⇒ r ∝ 1 ω 2 Since ω is double thus, r ′ = 4 r 4 = r

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