A 1,220-kg car traveling initially with a speed of 25.0 m/s in an easterly direc
ID: 2185033 • Letter: A
Question
A 1,220-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 8,800-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) How much mechanical energy is lost in the collision? (Use input values with an adequate number of significant figures to calculate this answer.)
kJ
Account for this loss in energy.
Explanation / Answer
1220*25 + 8800*20 = 1220*18 + 8800*v,,,,,,,,,,,v=20.97 m/s,,,,,,,,,,,, mechanical energy is lost in the collision= final KE - initial KE = 8.75004 KJ
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