The wheel of a toy car rotates about an axis on the rough surface. Its angular frequency slows down from 400 rps to 200 rps in 2 s . Then its angular retardation in r a d s - 2 is

Question

The wheel of a toy car rotates about an axis on the rough surface. Its angular frequency slows down from 400 rps to 200 rps in 2 s . Then its angular retardation in r a d s - 2 is, 200 π, 100 π, 400 π, None of these

MARKS App · Accepted Answer

Given, ω 1 = 2 π × (400) rad s - 1 ω 2 = 2 π × (200) rad s - 1 α = 2 π 4 0 0 - 2 0 0 2 = 2 0 0 π radions α is the retardation.

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