Kinematics Question 762

Question: A stone is tied to one end of a string 50 cm long it’s 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]

Options:

A) 493 cm/s2

B)720 cm/s2

C) 860 cm/s2

D)990 cm/s2

Show Answer

Answer:

Correct Answer: A

Solution:

$ a=4{{\pi }^{2}}n^{2}r=4{{\pi }^{2}}{{( \frac{1}{2} )}^{2}}\times 50=493cm/s^{2} $



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