Answer:
a. before the object passes over the box
Step-by-step explanation:
To let in the object into the box, you must drop the object before its passes over the box.
- This form of problem is a projectile motion.
- Dropping the object before it passes over the box will direct it into box at an angle.
- The object will drop in the box if it is dropped after passing or just as it passes over the box.