Dynamics of Circular Motion: Practice Problem & Solution

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Dynamics of Circular Motion. Understanding the underlying formula is key to arriving at the correct answer below:

Concept: Centripetal force is provided by the tension in the string.
Formula: Centripetal force \(F_c = \frac{mv^2}{l}\). Here, \(F_c = T\).
Solution: \(T = \frac{mv^2}{l}\). Rearranging for \(v\), we get \(v^2 = \frac{Tl}{m}\), so \(v = \sqrt{\frac{Tl}{m}}\).