Motion In Two Dimensions question bank (Physics)

Two particles are separated by a horizontal distance $'x'$ as shown. They are projected at the same time as shown with different initial speeds. The time after which the horizontal distance between them becomes zero is
$\left\{ \cos 30^\circ = \dfrac{\sqrt{3}}{2}, \cos 60^\circ = \dfrac{1}{2} \right\}$

A string of length 'L' fixed at one end carries a mass 'm' at the other end. The string makes $\dfrac{3}{2\pi}$ revolutions per second around the vertical axis through fixed end. The tension in the string is