Work Done by Braking Force to Stop a 1240 kg Car at 86.0 km/hr

[brittany_g18]

With brakes fully applied, a 1240 kg car deccelerates from a speed of 86.0 km/hr. What is the work done by the braking force in bringing the car to a stop?

What is the change in the kinetic energy of the car?


I keep trying and it saying my answers are wrong can anyone help?

 

[vela]

You need to show your work so we can see what mistake you're making.

 

[RoyalCat]

Moderator's note: answer deleted by Redbelly98.

It's possible to solve the question using the Work-Energy theorem. You've pretty much solved it in your post without noticing.

You aren't asked for the force or the distance, just the work done in bringing the car to a halt, and that's straightforward.