A Ball Rolls Up a Slope

question 28

Multiple Choice

A ball rolls up a slope. At the end of three seconds its velocity is 20 cm/s; at the end of eight seconds its velocity is 0. What is the average acceleration from the third to the eighth second?

• A) 2.5 cm/s²
• B) 4.0 cm/s²
• C) 5.0 cm/s²
• D) 6.0 cm/s²
• E) 6.67 cm/s²

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Definitions:

Matrilineal

Children trace their family descent through their mother’s line, and property is passed on to female heirs.

Surrogate Fathers

Men who take on the role of a father figure in the life of a child who is not biologically theirs.

Economic Necessity

The requirement of economic resources or actions to satisfy basic needs or preserve financial stability.

Puritans

A group of English Protestants in the 16th and 17th centuries who sought to purify the Church of England from its Catholic practices.