1. The problem statement, all variables and given/known data With brakes fully applied, a 1480 kg car deccelerates from a speed of 91.0 km/hr. What is the work done by the braking force in bringing the car to a stop? 2. Relevant equations 1/2(mass)(v^2) 3. The attempt at a solution 1/2(1480)(25^2) = 462500 I converted km/hr to m/sec to get 25 for the v value. They want us to include the sign of the acceleration so i added a negative sign to make the answer -462500 but it was wrong (I also tried it without the negative sign). What am I missing? Thank you so much!