A variable-speed drill, initially turning at 150 rpm, speeds up to 1300 rpm in a time interval of 1.0 s. What is its average rotational acceleration?

Question

______rpm/s2

Answer 1

change in rad/s = 1150 revs/min /1s

= 1150 rev/min * 1 min/60 s * 2pi rad/rev /1 s