Teaching JKPSC Lecturership Mock Test Series 2024-25 Physical Sciences Classical Mechanics Rigid Body Dynamics
Consider a conical pendulum consisting of a bob of mass M attached to a string, which rotates uniformly with a constant angular velocity. If we take the origin at the point where the string is fixed and assume a uniform circular motion, what is the torque ( \(\tau_B\) ) about a point at the center of the circular path?
1
\(\tau_B = 0\)
2
\(\tau_B = M g l \sin \alpha \hat{\theta} \)
3
\(\tau_B = M l v^2 \cos \alpha \hat{k}\)
4
\(\tau_B = M r \omega^2 \hat{\theta}\)