If a Rocket Is Fired Vertically into the Air with a Speed

question 184

Multiple Choice

If a rocket is fired vertically into the air with a speed of feet per second, its height at time t seconds is given by . Here is a graph of its height at various times, with the details left out. How long will the rocket be in the air? ( Hint : How high is it when it hits the ground?)

• A)20 seconds
• B)16 seconds
• C)24 seconds
• D)15 seconds
• E)14 seconds

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Definitions:

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The alteration of behavior by the subjects of a study due to their awareness of being observed.

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