Relative Velocity: a Swimmer Heading Directly Across a River 200

question 3

Essay

Relative velocity: A swimmer heading directly across a river 200 m wide reaches the opposite bank in 6 min 40 s, during which time she is swept downstream 480 m.
(a) How fast can she swim in still water?
(b) What is the speed of the current?

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Definitions:

Fat Cells

Specialized cells that store energy in the form of fat and regulate metabolism.

Eustachian Tube

A small canal that connects the middle ear to the throat, helping to equalize air pressure on both sides of the eardrum and drain fluid from the middle ear.

Ear Infections

Inflammations or infections of the ear, which can affect the outer, middle, or inner parts, often causing pain, fluid buildup, and sometimes hearing loss.

Motor Skills

The abilities required to control the small and large muscles of the body for movements such as walking, jumping, and holding.