A boxcar of mass 200 tons at rest becomes uncoupled on a 2.5 degree grade. If the track is considered to be frictionless, what speed does the boxcar have after 10 seconds?

Answer 1

I will be glad to critique your efforts. No one is showing any work.

Answer 2

I cant find the acceleration needed to solve the problem. All i know is 200tons is equal to 200000kg. and I don't understand 2.5 degree grade. would it be 200000cos2.5 ... but then how do i get acceleration from there.