9Momentum Impulse CollisionsMedium1 mark
The diagram shows an object on a horizontal air track moving with velocity u towards a stationary identical object.
The objects collide and stick together. The objects then move along the track with velocity v.
Assume there is no friction between the objects and the track.
What is the effect of the collision on the total momentum and the total kinetic energy of the objects?
| total momentum | total kinetic energy | |
|---|---|---|
| A | conserved | changed |
| B | conserved | unchanged |
| C | not conserved | changed |
| D | not conserved | unchanged |