Object X travels to the right across a frictionless surface towards a stationary object Y, as shown. A sound is produced when they collide, and after that both objects continue moving to the right. Which equation is correct?
- Achange in momentum of X = change in momentum of Y
- Bimpulse of force acting on X = impulse of force acting on Y
- Ckinetic energy of X before collision = (kinetic energy of X + kinetic energy of Y) after collision
- Dmomentum of X before collision = (momentum of X + momentum of Y) after collision