A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 s, what is the magnitude and direction of acceleration of the stone?

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Time period(T)=25/14, omega(W)= 2Pi/T= 2*22*14/7*25=88/25 acceleration= w2/r= (88/25)2/0.8
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