You are a professional driver on a closed course. Your job in this activity is to find the coefficient of friction between your tires and the road surface. Use your gas pedal to get up to your desired starting speed, then let off the gas so you can maintain that speed until you reach the start braking line. Hit the brakes when you get to the start braking line and see how much distance was required to stop your car.

If you select touch version, you must touch and release the gas pedal or the brake pedal to activate and touch and release the pedal again to deactivate.