- #1

kitenyos

- 12

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## Homework Statement

A car is traveling at 66.9 mi/h on a horizontal highway.

The acceleration of gravity is 9.8 m/s2 .

If the coefficient of friction between road and tires on a rainy day is 0.13, what is the minimum distance in which the car will stop? (1 mi = 1.609)

Answer in units of m.

Vi=29.9m/s

mu=.13

Vf=0m/s

## Homework Equations

Ff=(Fn)(mu)

## The Attempt at a Solution

There is no mass so i cannot calculate the normal force and i cannot calculate the Ff. At first I thought this problem was impossible because of lack of information but i did some research and all i could find is that "the mass cancels out". I do not understand this.