|MadSci Network: Physics|
Yes, speed effects weight due to the "ground effect". At high speeds for a car (low speeds for an airplane), a force called "lift" is created. A very good description and additional information on the ground effect can be found at the following link: htt p://www.madsci.org/posts/archives/may2000/958682159.Ph.r.html The lift raises the car off of the ground, reducing the contact of the tires. Both steering and the propulsion rely on frictional contact between the tires and the road (the traction). The spoiler creates a downward force, to counteract the lift, and improve the traction. Chris Seaman Sr. Staff Engineer Alcoa Technical Center
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