Calculating Braking Time for 800 kg Car

[lindzpooh]

so lost! help!

Homework Statement

The brakes of an 800-kg car exert a force of 4.4kN. (a) how long will the brake take to slow the car to a stop from an initial speed of 34m/s

Homework Equations

The Attempt at a Solution

 

[Hootenanny]

Hi there lindzpooh and welcome to the forums,

Do you know a (quite famous) equation that links force, mass and acceleration?

 

[lindzpooh]

i know mass is E0=Mc2
acceleration= change in speed/time interval

 

[Hootenanny]

Yes, your second one will be useful, but you need another one as well, Newton thought of it I believe...