A Car Accelerates Uniformly from Rest to a Speed of 20

question 37

Multiple Choice

A car accelerates uniformly from rest to a speed of 20 m/s at the end of 1 min; it then accelerates uniformly to a speed of 40 m/s at the end of the next minute.During this 2-min period,the average speed of the car is

• A)7.5 m/s
• B)30 m/s
• C)15 m/s
• D)20 m/s
• E)40 m/s

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Definitions:

Stress

A physical or psychological response to internal or external pressures, perceived as challenging or threatening to an individual's well-being.

Physically

Relating to the body as opposed to the mind or spirit.

Psychologically

Pertaining to the mind or mental processes and how they influence behavior and well-being.

CT Scans

A medical imaging technique that uses computer-processed combinations of many X-ray measurements taken from different angles to produce cross-sectional images of specific areas of a scanned object.