Finding the friction coefficient?

[papi]

Homework Statement

Hopping into your Porsche, you floor it and accelerate at 11.2 m/s2 without spinning the tires. Determine the minimum coefficient of static friction between the tires and the road needed to make this possible.

Homework Equations

well I know fs/N= the coefficient, however, even though N=ma, you dnt have an m nor an a. i just dnt see adequate info given. help!

 

[PhanthomJay]

Homework Statement

Hopping into your Porsche, you floor it and accelerate at 11.2 m/s2 without spinning the tires. Determine the minimum coefficient of static friction between the tires and the road needed to make this possible.

Homework Equations

well I know fs/N= the coefficient,

yes

however, even though N=ma,

why do you say N=ma?

you dnt have an m nor an a. i just dnt see adequate info given. help!

the acceleration, a, is given. Write the Newton 2 equation, looking in the x direction. What's the net force in that direction? Maybe you won't need to know m