A small body having mass 1kg is rotating in a circle of radius 10cm. I – McqOptions

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1.	A small body having mass 1kg is rotating in a circle of radius 10cm. It is connected to the centre with the help of a string having young s modulus = 10¹¹N/m². Find change in length of wire while the mass is rotating with constant speed of 2m/s. The cross sectional area of string is 1cm².
A.	0.4 m
B.	4 m
C.	40 m
D.	0.4m
Answer» B. 4 m

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