Question 240801
The size of a radian is determined by the requirement that there are {{{2*pi}}} radians in a circle. So each revolution is {{{2*pi}}}radians

{{{1500 RevolutionPerMinute = (1500/60)RevolutionPerSecond}}} = {{{25rps}}}
{{{(2*pi) radians = 1 revolution}}}

{{{25RevolutionPerSecond = 25*((2*pi)radians)PerSecond}}}
{{{50*pi}}} radians per second