Circular MotionEasy
Question
A stone tied to the end of string of 80 cm long. is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 sec, them magnitude of acceleration of the same will be
Options
A.990cm/ sec2
B.680cm/ sec2
C.750cm/ sec2
D.650cm/ sec2
Solution
Centripetal accn = ω2r =(2n)2 × r
where frequency, n =
∴ accn = 4 ×
= 900cm/sec2
where frequency, n =
∴ accn = 4 ×
= 900cm/sec2
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