Kinematics Question 737
Question: A mass of 2 kg it’s whirled in a horizontal circle by means of a string at an initial speed of 5 revolutions per minute. Keeping the radius constant the tension in the string is doubled. The new speed is nearly [MP PMT/PET 1998; JIPMER 2000]
Options:
A) 14 rpm
B)10 rpm
C) 2.25 rpm
D)7 rpm
Show Answer
Answer:
Correct Answer: D
Solution:
Tension in the string
therefore
therefore
