A 1500 kg car traveling West at 90.0 km/h collides with a 1400 kg truck traveling East at 72.0 km/h.
The two vehicles entangle after the collision and head off as one. What is the velocity of the
wreckage immediately after the collision?

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.