It has changed by 15m/s.Sorry about that I'm getting all mixed up.I heard that I have to get the vector components of the acceleration so I need help there really.
Homework Statement
A car initially traveling north at 35 m/s, brakes and turns to avoid an obstacle so
that 3 seconds later it is traveling northeast at 20 m/s. Find its average accelera-
tion during the period of braking and turning.
Homework Equations
acceleration=change in...