I was watching the fast and the furious and then fast five. I saw that the 70s charger and the 2000s charger's front end just picked up off the ground with the reer wheels going. I know muscle cars have reer wheel drive but I don't get how the front end gets picked up. What makes the front end of a rear wheel drive car go up?
Hi for every action there is an opposite reaction so the rear wheels rotate into the ground when moving forward and if this force is strong enough it will have the action of lifting the front wheels off the ground. some drag racing cars fuel-led with nitrous oxide have been known to flip right over and killing the driver and spectators as a result.
its physics.. when the rear wheels deliver that much force something has to give in that case the front tires come off the ground.. I have seen a moded f-250 crush beer cans all night long just by popping the clutch.
Inertia. Assume that there is sufficient traction for the wheels to grab the pavement, even with a lot of horsepower spinning the wheels. The wheels are at the back of the car, while the center of gravity is about half-way between the axles. The inertia of the car wants to keep it where it is, and the center of gravity tries to stay where it is. When the wheels push the car hard enough, the acceleration is great enough that the front end lifts up. Front-wheel drives can't do this because the wheels are pulling the car forward; on a rear-wheel-drive car, the wheels are pushing the car forward. If you look closely, you'll see the front end of any car lift a little bit- maybe just a half-inch- when the car accelerates briskly. For the movies, it looks much more exciting to have the front end leave the ground by a few feet. BTW, motorcycles do the same thing, don't they? (Offhand, I'm not aware of any front-wheel-drive motorcycle.) Take care!
It's the mechanics of the suspension. Under hard acceleration the tires spin pushes the leading edge of the tires down into the pavement. For every action, there is an equal & opposite re-action, so the axle housing is pushed up. If there's enough torque & traction, the rear end will pull the entire front of the car up. Every rear drive car will do that to some extent.
Regardless of which wheels are driven (front, rear, all 4), the front end of a car will lift when accelerating forward. It works in reverse too - lifting the rear end when accelerating backward. Front-drive cars can't lift the tires off the ground though, because as the front tires have less and less weight on them, they have less and less traction to apply that force. Front end unloading is very simple to understand when you consider the forces involved and their respective vectors. In the simplest terms (and ignoring gravity for a moment), the ground is exerting a force on the car. In order to imagine the correct force, understand that the force is being applied to the center of mass of that car, but the force is applied through a contact point. The center of mass is different with each car, but it's obviously always going to be above the ground. So the force is acting in a straight line from the contact point (where the tires touch the ground) toward the center of mass, which is above ground. Therefore, the force always has an upward component. A racecar is very low to the ground, so the upward component of the force is much smaller than a lifted truck's would be. The same effect can be achieved by altering the length of the wheelbase as well. Linkage-based suspension setups can reduce the effect by causing the rear end to lift a similar amount, but cannot completely eliminate it due to the physics discussed above.
