A Car Is Rounding the Top, or Crest, of a Hill

question 27

Multiple Choice

A car is rounding the top, or crest, of a hill while moving at a steady 50 km/hr. What can you say about this car's acceleration, and why?

• A) The car is accelerated, because its speed is changing.
• B) The car is not accelerated, because its speed is not changing.
• C) The car is not accelerated, because its direction of motion is not changing.
• D) The car is accelerated, because its direction of motion is changing.
• E) The car is not accelerated, because neither its direction of motion nor its speed are changing.

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Definitions:

Unambiguous

Clear and precise with only one interpretation, leaving no doubt or confusion.

Ambiguous

Something that can be understood in more than one way; lacking clearness or definiteness.

Productivity

In industry, the capability to produce effectively, gauged by how much output is generated per input unit.

Reinforcement

In psychology, a process by which a behavior is strengthened or increased in frequency, often through the application of a reward or the removal of a negative stimulus.