# All that matters is the constant velocity!

**Classical Mechanics**Level 5

There is a thin string of linear mass density \(\rho\), which is going around a pulley of radius \(R\), with constant velocity \(v\).

Determine the internal tension in the string.

**Details and Assumptions**

There is no net force acting on the pulley-string system.

Neglect gravity.

Take \(\rho = 0.25 \text{ kgm}^{-1}, R = 0.25 \text{ m}, v = \sqrt{13} \text{ ms}^{-1}\).