Kinematics Question 552
Question: A particle is tied to 20cm long string.It performs circular motion in vertical plane. What is the angular velocity of string when the tension in the string at the top is zero [RPMT 1999]
Options:
A) $ 5rad/sec $
B) $ 2rad/sec $
C) $ 7.5rad/sec $
D) $ 7rad/sec $
Show Answer
Answer:
Correct Answer: D
Solution:
$ \omega =\sqrt{\frac{g}{r}}=\sqrt{\frac{9.8}{0.2}}=7rad/s $
