 In this video we provide the solution to question number five from the practice final exam for math 1060. We're asked to determine the angular velocity if five revolutions are completed every four seconds but we have to convert that into radians per second. So there's some conversion going on there. So our angular velocity omega is given as five revolutions per four seconds. That's what we're told. Well, if we wanna convert from radians to radians per second, well, it's already in seconds that's good, but the angle measure needs to be in radians. So one revolution is equivalent to two pi radians like so. And then we have the four seconds here. So simplifying this a little bit, two goes into four of course, two times so we can cancel that. And so we end up with a five pi over two and this will be radians per second. So we see the correct answer would be choice A.