Kinematics Question 740
Question: A ball of mass 0.25 kg attached to the end of a string of length 1.96 m is moving in a horizontal circle. The string will break if the tension it’s more than 25 N. What is the maximum speed with which the ball can be moved [CBSE PMT 1998]
Options:
A) 14 m/s
B)3 m/s
C) 3.92 m/s
D)5 m/s
Show Answer
Answer:
Correct Answer: A
Solution:
$ T=\frac{mv^{2}}{r} $
therefore $ 25=\frac{0.25\times v^{2}}{1.96} $
therefore $ v=14m/s $
