A disc of radius 10cm is rotating about the central axis perpendicular – McqOptions

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1.	A disc of radius 10cm is rotating about the central axis perpendicular to its plane. A force of 5N acts on it tangentially. The disc was initially at rest. Calculate the value of power supplied by the force when the disc has rotated by 30°.The mass of the disc is 2kg.
A.	1.28W
B.	1.8W
C.	3.9W
D.	2.63W
Answer» C.

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