what is the purpose of spoilers on cars
Spoiler (car) A spoiler is an automotive aerodynamic device whose intended design function is to 'spoil' unfavorable air movement across a body of a vehicle in motion, usually described as turbulence or drag. Spoilers on the front of a vehicle are often called air dams. Spoilers are often fitted to race and high-performance sports cars, although they have become common on passenger vehicles as well. Some spoilers are added to cars primarily for styling purposes and have either little aerodynamic benefit or even make the aerodynamics worse.
Lightning McQueen Five years after the events of the first film in 2006- in 2011, Lightning McQueen, now a four-time Piston Cup champion, returns to Radiator Springs after a successful racing season. He is pleased to renew his friendship with Mater. McQueen's respite is interrupted when he is recruited to participate in the first ever World Grand Prix, sponsored by former oil tycoon Miles Axelrod to promote his new biofuel, Allinol. McQueen initially declines but is publicly taunted by Formula One race car Francesco Bernoulli. Mater intervenes to defend McQueen, leading him to reconsider and join the race. Mater hopes to tag along on the tour and, despite concerns about Mater's meddling behavior, McQueen reluctantly agrees.