A stone tied to one end of string 80 cm long is whirled in a horizontal circle with a constant speed. If stone makes 14 revolutions in 25 sec, the magnitude of acceleration of stone is :
Text Solution
Verified by ExpertsThe correct answer is:
B
Time period
= 
= 
= 1.79 sec
Now angular speed
ω = 
= 
= 3.51 rad/sec
Now magnitude of acceleration is given by
a = ω 2 I = (3.51) 2 × 80
= 985.6 cm/sec 2 = 996 cm/sec
2
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