The gravitational attraction of an object toward the center of the Earth is determined by its mass. The greater the mass, the greater the gravitational attraction.
Among the options provided:
- A 1,500-kilogram truck
- A 0.4-kilogram book
- A 3-kilogram bag of rice
- A 400-kilogram roller coaster car
The object with the greatest gravitational attraction toward the center of the Earth is the 1,500-kilogram truck since it has the largest mass.