A Ball Is Held at a Height H Above a Floor

question 29

Multiple Choice

A ball is held at a height H above a floor. It is then released and falls to the floor. If air resistance can be ignored, which of the five graphs below correctly gives the mechanical energy E of the Earth-ball system as a function of the altitude y of the ball?

• A) I
• B) II
• C) III
• D) IV
• E) V

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Definitions:

Calvin Cycle

The Calvin cycle is a set of biochemical redox reactions that take place in the stroma of chloroplasts in photosynthetic organisms. It is a critical part of the process of carbon fixation in photosynthesis.

CO2

Carbon dioxide, a colorless gas with a slightly acidic taste and odor, a byproduct of respiration and an important greenhouse gas in Earth's atmosphere.

Chemoautotroph

Organism that obtains energy from inorganic compounds and synthesizes organic compounds from inorganic raw materials; includes some bacteria and many archaea. Compare with photoautotroph, photoheterotroph, and chemoheterotroph.

Nitrogen-Fixing Bacteria

are bacteria capable of transforming atmospheric nitrogen into fixed nitrogen, making it accessible to plants for growth.