A2 kg cart going 1 m/s to the right crashes into a 2 kg cart going 1 m/s in the opposite direction (to the left). What is the total momentum of the system before and after the colision?
Okg m/s
4 kg m/s
4J
2 kg m/s

The momentum of an isolated system is conserved a) only in inelastic collisions. b) only in elastic collisions. c) in both elastic and inelastic collisions

How would a small bar magnet be oriented when placed at position x?

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?