A grinding wheel (radius 7.6cm) is rotating at 1750 rpm. (a) What i the speed of a point on the outer edge of the wheel? (b)What is the centripetal acceleration of the point? I do this question in this way: (a) f= 1750rpm = 29.167rps => T= 1/f = 0.03428 v= (2"pie"r) / T = 13.93 (sorry...I dont know how to key in "pie", can anyone teach me?) (b) a = (v^2) / r = 2553.2 Am I right?