Question
Question: A string of length L is fixed at one end and carries a mass M at the other end. The string makes 2/p...
A string of length L is fixed at one end and carries a mass M at the other end. The string makes 2/p revolutions per second around the vertical axis through the fixed end as shown in the figure, then tension in the string is –
A
ML
B
2 ML
C
4 ML
D
16 ML
Answer
16 ML
Explanation
Solution
w = 2/p rev/s = 4 rad/s
Tsinq = mw2r
̃ Tsinq = mw2(Lsinq)
̃ T = mw2L = m(4)2L = 16mL
