8. The force of attraction (F) between two objects is inversely proportional
to the square of the distance (d) between them.
When d = 4, F = 30
Calculate F when d = 8.
Using the inverse square law formula:
F = k / d^2
We can find the value of k using the given information when d = 4 and F = 30:
30 = k / 4^2
30 = k / 16
k = 30 * 16
k = 480
Now that we have the value of k, we can find F when d = 8:
F = 480 / 8^2
F = 480 / 64
F = 7.5
Therefore, when d = 8, F = 7.5.