Jee Main
Laws Of Motion
JEE Main 2021 (Online) 20th July Evening Shift
INTEGER+4 / -12021
A body of mass 'm' is launched up on a rough inclined plane making an angle of 30\(^\circ\) with the horizontal. The coefficient of friction between the body and plane is \({{\sqrt x } \over 5}\) if the time of ascent is half of the time of descent. The value of x is __________.