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# CBSE Class 11-science Answered

A circular disc of radius 100 rolls on a smooth horizontal surface with a velocity of 36 km/h. How many revolution does the disc makes per sec ?
Asked by | 15 Oct, 2013, 10:29: PM
Expert Answer
The radius of disc is r = 100 cm = 1 m
The velocity of disc is v = 36 km/h = 10 m/s

Thus, number of revolutions per second, that is, frequency, is

Answered by Romal Bhansali | 16 Oct, 2013, 09:24: AM

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