Two objects X and Y make up an isolated system. X and Y collide and then move apart. The mass of X is larger than the mass of Y. Which statement about the collision is correct?
- AThe change of momentum of Y is greater than the change of momentum of X.
- BThe force on Y is greater than the force on X.
- CThe forces that X and Y exert on each other act for the same length of time.
- DThe forces that X and Y exert on each other are gravitational forces only.