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} $
