To determine which two objects will have the strongest attractive force between them, we can use Coulomb's law, which states that the force between two charged objects is directly proportional to the product of the magnitudes of their charges and inversely proportional to the square of the distance between them.
Attractive forces occur between opposite charges. From the table:
- Object A has a charge of +1 C.
- Object B has a charge of +2 C.
- Object C has a charge of -1 C.
- Object D has a charge of -2 C.
Now, let's evaluate the pairs for attractive forces:
- Object B and Object C: Charges are +2 C and -1 C. The product of the charges is \(2 \times -1 = -2\).
- Object A and Object B: Charges are +1 C and +2 C. Both are positive, so they repel each other (no attractive force).
- Object A and Object C: Charges are +1 C and -1 C. The product of the charges is \(1 \times -1 = -1\).
- Object B and Object D: Charges are +2 C and -2 C. The product of the charges is \(2 \times -2 = -4\).
Considering the attractive forces:
- The strongest attractive force occurs between object B and object D, with a product of -4 (the largest absolute value).
Thus, the correct answer is:
object B and object D.