A Fireman Is Sliding Down a Fire Pole

question 35

Multiple Choice

A fireman is sliding down a fire pole.As he speeds up,he tightens his grip on the pole,thus increasing the vertical frictional force that the pole exerts on the fireman.When the force on his hands equals his weight,what happens to the fireman?

• A)The fireman comes to a stop.
• B)The fireman descends with slower and slower speed.
• C)The fireman descends with a smaller but non-zero acceleration.
• D)The fireman continues to descend,but with constant speed.
• E)The acceleration of the fireman is now upward.

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Definitions:

Prokaryotes

Microorganisms characterized by the absence of a distinct nucleus, including bacteria and archaea.

Telomeres

Protective cap-like structures at the ends of chromosomes that prevent the loss of genetic information during cell division.

Aging

The process of becoming older, a series of biological changes that occur in living organisms over time.