Gravity pulled three toy cars of different cases down an inclined ramp, 0.3 kg, 0.9 kg, and 1.8 kg. What is the ratio of the masses of the toy cars?

clearly the ratios are

0.3 : 0.9 : 1.8
= 1:3:6

To find the ratio of the masses of the toy cars, we need to divide the mass of one car by the mass of another car. In this case, let's take the lightest car, which has a mass of 0.3 kg, and divide it by the other two cars.

Ratio of masses = (Mass of lighter car) / (Mass of heavier car)

So, let's calculate the ratios:

For the lighter car (0.3 kg):
- Ratio with the middle car (0.9 kg) = 0.3 kg / 0.9 kg = 1/3
- Ratio with the heaviest car (1.8 kg) = 0.3 kg / 1.8 kg = 1/6

Therefore, the ratio of the masses of the toy cars is:
1:3 (lightest car : middle car)
1:6 (lightest car : heaviest car)