Fast car physics
The average driver doesn't think about what keeps their car moving or what keeps them on the road, but that's because they don't have to. The average driver doesn't have to worry about having enough downforce to keep them on the road or if they will reach the adhesive limit of their car's tires around a turn. These are the things are the car designers, professional drivers, racing pit crews, serious sports car owners, and physicist think about. Physics are an important part of every sports and racing car design. The stylish curves and ground effects on sports cars are usually there not just for form but function as well allowing you to go speeds over 140 mph in most serious sports cars and remain on the road and in reasonable control. The aerodynamic efficiency is the single most important element in designing a competitive car for professional racing or getting the car model on the front of a Car and Driver or Motortrend. Aerodynamics is the study of the motion of gases on objects and the forces created by this motion. The Bernoulli effect is one of the most important behind car design. The Bernoulli Effect states that the pressure of a fluid, in gaseous or liquid state, varies inversely with speed or velocity and a slow
The Venturi Effect is also an important in aerodynamic design. The Venturi Effect states that as a fluid, in gaseous or liquid state passes through a narrow space its speed increases (Yager). This is the reasoning behind keeping cars as close to the ground as they can be safely. The narrow space between the car and the ground increases the speed of the air flowing beneath it causing a decrease in pressure to do the Bernoulli Effect and increase in downforce. The Venturi Effect is the reason for front ground effects, which feature small air ducts or venturi tunnels. Using a late model Corvette, which has 240hp and can go 150mph we can determine how much of that horsepower is needed to maintain different speeds (Beckman). Using the top speed of 150mph which is maintained by keeping the gas pedal to the floor using all the horsepower we can determine how much horsepower is used to fight air resistance and how much is used to fight rolling friction and the slight internal friction (Beckman). A late model Corvette has a Cd of about 0.30 and frontal area of about 20 square feet (Beckman). Going through all the necessary conversions and math which is complicated because of converting to and from metric and force into horsepower you determine 145hp is used to balance drag and 95hp is used to balance the rolling resistance and internal friction (Beckman). This explains why fast cars have so much horsepower. As speed increases so does the drag and more horsepower is needed to compensate for this. Tires are an essential part of every car and certain sized tires serve different purposes. As far as handling is and acceleration are concerned "wider is better" as Pontiac would say. The reason you don't see extremely wide tires on cars is because it increases the contact patch or area of the tire that touches the road. If you increase this car will accelerate and how fast it will go. Newton's second law is the easiest to understand in relation to a car's acceleration. Newton's second law mathematically states Force=(mass)(acceleration) (Murphy 78). This law explains why cars that need to accelerate fast should be relatively light in weight compared to other cars. Removing mass, such as a bumper, radio or fancy upholstery reduces the weight of a car. When the tires create a constant force and the mass is decreased the a
Some common words found in the essay are:
Corvette Cd, Force=massacceleration Murphy, Yager Negative, , Bernoulli Effect, Venturi Effect, F=CdApv2 Beckman, Acceleration Speed, Beckman Using, Motortrend Aerodynamics, rolling resistance, air passing car, air passing, drag force, negative lift, car accelerate, newton's law, passing car, internal friction, fast car, contact patch, resistance internal friction, horsepower maintain speeds, late model corvette, yager negative lift,
Approximate Word count = 1576
Approximate Pages = 6 (250 words per page double spaced)
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