Enter the velocity of a car and the coefficient of friction between the tires and the road into the calculator to determine the stopping distance.

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## Stopping Distance Formula

The following formula is used to calculate the stopping distance of a moving object.

D = v^2 / (2*u*g)

- Where D is the stopping distance (m)
- v is the velocity (m/s)
- u is the coefficient of friction
- g is the acceleration due to gravity (9.8 m/s^2)

To calculate the stopping distance, square the velocity, then divide by the product of 2 times the coefficient of friction times the acceleration due to gravity.

## FAQ

**What is a stopping distance?**

A stopping distance is a term usually applied to cars that describes the total amount of distance to stop when a car brakes from a certain speed. The formula above assumes constant friction, which may not be the case if the car’s wheels are rolling then start to slide and vice versa.