The objects listed all have mass, and gravitational attraction depends on mass. However, since each object has a different mass, the one with the least mass will experience the least gravitational attraction toward Earth.
The objects in question are:
- 380-gram cup
- 5-gram pencil
- 75-gram calculator
- 40-gram eraser
Among these, the 5-gram pencil is the lightest and will experience the least amount of gravitational attraction toward Earth.