Recent content by physicgeek

sorry I am new. what i did was i took the kinetic energy of both and subtracted them. but i got it wrong on webassign. (online homework)

A 1100 kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 8200 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. 1.How much mechanical energy is lost in the...