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Flame SCF 18 Near Chawla Lights Ph-7 Mohali 9888949978

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 - (1 vote)

PrevPrevious16. A car is moving at a speed of 72 km/hr. the diameter of its wheels is 0.5 m. If the wheels are stopped in 20 rotations by applying brakes, then angular retardation produced by the brakes is

Next18. A particle B is moving in a circle of radius a with a uniform speed u. C is the centre of the circle and AB is diameter. The angular velocity of B about A and C are in the ratioNext

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