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17. A wheel is rotating at 900 r.p.m. about its axis. When the power is cut-off, it comes to rest in 1 minute. The angular retardation in radian/s2 is

(a)       π/2

(b)      π/4

(c)  π/6

(d) π/8

Ans. a

(5)

5/5 - (1 vote)

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