# A 1 275 kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the back of a 8 600 kg truck moving in the same direction at 20.0 m/s. The velocity of the car right after the collision is 18.0 m/s to the east.

+2 votes

A 1 275 kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the back of a 8 600 kg truck moving in the same direction at 20.0 m/s. The velocity of the car right after the collision is 18.0 m/s to the east.

(a) What is the velocity of the truck right after the collision?
m/s east

(b) What is the change in mechanical energy of the car–truck system in the collision? (Use input values with an adequate number of significant figures to calculate this answer.)
J

(c) Account for this change in mechanical energy.

asked Oct 23, 2011 in Physics

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