A Racecar Driver Steps on the Gas,changing His Speed from 10

question 136

Multiple Choice

A racecar driver steps on the gas,changing his speed from 10 m/s to 30 m/s in 4 seconds.The acceleration of the racecar is

• A)0
• B)2 m/s².
• C)4 m/s².
• D)5 m/s².
• E)7.5 m/s².

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Definitions:

Capillary Exchange

The process of exchange of water, nutrients, and waste materials between blood and tissues through capillary walls.

Exocytosis

Elimination of material from a cell through the formation of vacuoles.

Diffusion

The process by which molecules spread from areas of high concentration to areas of low concentration.

Cross-sectional Area

The area of a particular section of an object or substance, usually measured perpendicular to a specific axis.