Kinematics Question 738
Question: A string breaks if it’s tension exceeds 10 newtons. A stone of mass 250 gm tied to this string of length 10 cM is rotated in a horizontal circle. The maximum angular velocity of rotation can be [MP PMT 1999]
Options:
A) 20 rad/s
B)40 rad/s
C) 100 rad/s
D)200 rad/s
Show Answer
Answer:
Correct Answer: A
Solution:
$ T=m{{\omega }^{2}}r $
therefore $ 10=0.25\times {{\omega }^{2}}\times 0.1 $
therefore $ \omega =20rad/s $
