Give an example of speed making a difference in the amount of kinetic energy. Tell how you know that kinetic energy amount is different in your example. Please help this is due today

1. A car moving 40 mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph. Thus a modest increase in speed can cause a large increase in kinetic energy.

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d. learned preferences i believe is your answer

a and b sometimes have a positive value