To determine which object will experience the least amount of gravitational attraction towards the Earth, we can use the formula for gravitational force (weight):
\[ F = m \cdot g \]
where:
- \( F \) is the gravitational force (weight),
- \( m \) is the mass of the object, and
- \( g \) is the acceleration due to gravity (approximately \( 9.81 , \text{m/s}^2 \) on Earth's surface).
Since \( g \) is constant for all objects near the Earth's surface, the gravitational force is directly proportional to the mass of the object. Therefore, the object with the smallest mass will experience the least gravitational attraction.
The masses of the objects given are:
- Cup = 380 g
- Pencil = 5 g
- Eraser = 40 g
- Calculator = 75 g
Among these, the pencil has the least mass at 5 g.
Thus, the pencil will experience the least amount of gravitational attraction towards the Earth.