Momentum of a truck at an angle?

BryanC

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A 2600 kg truck traveling north at 38 km/h turns east and accelerates to 50 km/h.
(a) What is the change in the truck's kinetic energy?
(b) What is the magnitude of the change in the linear momentum of the truck?
(c) What is the direction of the change in the linear momentum of the truck?

I have a, how do I get B and C?
 
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