You grabbed a power drill that claims it can reach 2234 rpm in 0.8 s. How many revolutions does the drill make in 0.8 s?

Answer 1

average speed is half of top speed (from zero start)

rps = rpm / 60

(ave rps) * 0.8 s = revolutions

Answer 2

acceleration = a = [ (2234-0) res/60s ] /.8s
= 46.54 revs/s^2

revs = (1/2)a t^2
= (1/2)(46.54)(.64) = 14.9 revs

Answer 3

Either way :)