A Brass Ball Is Shot Vertically Upward from the Surface

question 89

Multiple Choice

A brass ball is shot vertically upward from the surface of an atmosphere-free planet with an initial speed of 20.0 m/s. One second later, the ball has an instantaneous velocity in the upward direction of 15.0 m/s.
-Determine the velocity of the ball when it returns to its original position. Note: assume the upward direction is positive.

• A)+20 m/s
• B)-20 m/s
• C)+40 m/s
• D)-40 m/s
• E)zero m/s

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Definitions:

Primary Bronchi

The two main divisions of the trachea that lead directly into the lungs, facilitating the flow of air.

Secondary Bronchi

The branches of the primary bronchi that lead into each lobe of the lungs, facilitating the transport of air.

Windpipe

Commonly known as the trachea, it's the tube that connects the larynx to the bronchi, providing air passage to the lungs.

Trachea

Also known as the windpipe, it is a large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes and conveying air to and from the lungs.