A Rotating Crankshaft
A car’s tachometer indicates the angular velocity of the crank shaft in rpm. A car stopped at a traffic light has its engine idling at 500 rpm. When the light turns green, the crankshaft’s angular velocity speeds up at a constant rate to 2500 rpm in a time interval of 3.0 s.
How many revolutions does the crankshaft make in this time interval?