A car engine is initially rotating at 180 rad/s. It is then turned off and takes 1.20 s to come to a complete stop. What is the angular acceleration of the engine? Assume acceleration is constant.

Answer 1

ω=ωₒ + ε•t,
ω =0,
ε = - ωₒ/t = - 180/1.2 = - 150 rad/s²