A stone is tied to one end of a string 50 cm long is whirled in a hori – McqOptions

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1.	A stone is tied to one end of a string 50 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 10 revolutions in 20 s, what is the magnitude of acceleration of the stone [Pb. PMT 2000]
A.	493 cm/s2
B.	720 cm/s2
C.	860 cm/s2
D.	990 cm/s2
Answer» B. 720 cm/s2

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