Question

A particle of mass 1 kg is suspended by means of a string of length L=2 m. The string makes $6/\pi$ rps around a vertical axis through the fixed end. The tension in the string is

• A. 72 N
• B. 36 N
• C. 288 N
• D. 10 N

Answer 1

The correct option is C 288 N

The tension is the centripetal force = $m{w}^{2}R$
The angular velocity is w=$\left(6/\pi \right)\left(2\pi \right)=12$ rads/s
Substituting we get, Tension = $1\times 144\times 2=288N$
Thus the correct options is (c)