A Boy Kicks a Football from Ground Level with a Certain

question 56

Multiple Choice

A boy kicks a football from ground level with a certain initial velocity at an angle 30.0° above the horizontal. In 2.00 seconds the ball completes its trajectory and hits the ground. What is the initial velocity of the ball?

• A) 9.80 m/s
• B) 4.90 m/s
• C) 39.2 m/s
• D) 19.6 m/s
• E) 78.4 m/s

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Definitions:

Four-drive Theory

A theory positing that human behavior is driven by four fundamental needs or drives: the drive to acquire, bond, learn, and defend.

Reactive

A response or behavior that occurs as a result of external stimuli, rather than initiating action proactively.

Proactive

An approach characterized by taking initiative and anticipatory actions to influence an outcome, rather than reacting to events after they occur.

McClelland's Learned Needs Theory

A psychological theory suggesting that individuals are motivated by three primary needs: achievement, affiliation, and power, which they learn over time.