# Is drag proportional to velocity?

• DRAGON LING
Drag force is proportional to the velocity for low-speed flow and the squared velocity for high speed flow, where the distinction between low and high speed is measured by the Reynolds number. Even though the ultimate cause of a drag is viscous friction, the turbulent drag is independent of viscosity.
• ### Is downforce good or bad?

Downforce can certainly make your car more stable, but when you are going for sheer speed, downforce can actually be a hindrance. Any increase in downforce also means an increase in drag. This is why many sportscars with deployable wings not only deploy those wings at high speed but also during braking.14 sept 2018
• ### How heavy is a smart car?

The weight of a smart car is approximately 1,550 pounds. The more energy or fuel it takes to power the car, the heavier the car will be. Since the “curb weight” corresponds to the weight of an empty vehicle or one parked on the shoulder, the curb weight of the smart car remains in pounds.
• ### Which of the below shape has least drag coefficient?

It is generally accepted that some variation of the teardrop/airfoil shape has the lowest drag coefficient.20 ago 2015
• ### Is drag a slowing force?

Friction drag force causes objects to slow down as they move through a fluid, such as air or water. Drag force is especially dependent on the speed of an object. As an object's speed increases, the drag force from the fluid increases exponentially.
• ### Can humans fly wings?

Humans will never fly by flapping our arms with wings attached, says Mark Drela, Terry J. Kohler Professor of Fluid Dynamics in the Department of Aeronautics and Astronautics. The arms and chest of a human do not have anywhere near enough muscle mass to provide the necessary power.30 nov 2010