A single horizontal force $F$ acts on block X, which is touching a separate block Y, as shown. The blocks stay in contact while they accelerate along a horizontal frictionless surface. Air resistance is negligible. X has a greater mass than Y. Which statement is correct?
- AThe acceleration of X is equal to force $F$ divided by the mass of X.
- BThe force that X exerts on Y is equal to $F$.
- CThe force that X exerts on Y is less than $F$.
- DThe force that X exerts on Y is less than the force that Y exerts on X.