16. 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
(a) – 25.5 rad/s2
(b) – 29.5 rad/s2
(c) – 33.5 rad/s2
(d) – 45.5 rad/s2
Ans. a
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a