Definition of aspiration. 1  1a : a strong desire to achieve something high or great an aspiration to become famous âusually plural a young man with political/literary aspirationsb : an object of such desire An acting career is her aspiration.
Wheel and axle. The wheel and axle is one of six simple machines identified by Renaissance scientists drawing from Greek texts on technology. The wheel and axle consists of a wheel attached to a smaller axle so that these two parts rotate together in which a force is transferred from one to the other.
Differential â Front and Rear. The differential is a gearbox located between the drive wheels on your vehicle. Most four-wheel drive vehicles have both a front and rear differential. Differentials work with your transmission to deliver power from your engine to the axle that turns your wheels.