Suppose the wind speed increases from 8 km/h to 16 km/h. Which of the following expresses the factor by which the force of the wind will have increased?
A)2
B)4
C)5
D)25

Question

Quizplus · Accepted Answer

The force of the wind is proportional to the square of the wind speed, so if the wind speed doubles (increases by a factor of 2), then the force of the wind increases by a factor of 2 squared, or 4.

Suppose the Wind Speed Increases from 8 Km/h to 16