Question

The crankshaft in a race car goes from rest to 3540rpm in 2.6s. What is the crankshaft's angular acceleration? How many revolutions does it make while reaching 3540rpm?

Answer 1

w = wa + at

wa = 0

w = at

a = w/t

3540/ 2.6  x 2pi/1 rev x 1 min/60 sec = 142.58 rad/s

for the second part, use angular displacement formula

hope this helps