A Rock Is Dropped from a High Tower and Falls

question 8

Multiple Choice

A rock is dropped from a high tower and falls freely under the influence of gravity. Which one of the following statements concerning the rock as it falls is true? Neglect the effects of air resistance.

• A)The rock will gain an equal amount of momentum during each second.
• B)The rock will gain an equal amount of kinetic energy during each second.
• C)The rock will gain an equal amount of speed for each meter through which it falls.
• D)The rock will gain an equal amount of momentum for each meter through which it falls.
• E)The amount of momentum the rock gains will be proportional to the amount of potential energy that it loses.

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Definitions:

Variable Cost

Costs that change in proportion to the level of activity or volume of production in a company.