Physics help? A 2700 kg truck traveling north at 39 km/h turns east and accelerates to 50 km/h.?

Posted on 2014-11-18 05:57:00 in Physics by DENNIS

What is the change in the truck's kinetic energy?
I already converted to m/s, and i set it up as: 1350(13.8^2-10.8^2) to get an answer of 99630J. But, this is wrong? I don't know what to do next.

(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?

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