A Ball Is Thrown at an Angle Of $45 ^ { \circ }$

question 89

Multiple Choice

A ball is thrown at an angle of $45 ^ { \circ }$ to the ground. If the ball lands $30$ m away, what was the initial speed of the ball? Let $g = 9.82 \mathrm {~m} / \mathrm { s }$ .

• A) \(v _ { 0 } \approx 17 \mathrm {~m} / \mathrm { s }\)
• B) \(v _ { 0 } \approx 22 \mathrm {~m} / \mathrm { s }\).
• C) \(v _ { 0 } \approx 42 \mathrm {~m} / \mathrm { s }\) .
• D) \(v _ { 0 } \approx 27 \mathrm {~m} / \mathrm { s }\)
• E) \(v _ { 0 } \approx 27 \mathrm {~m} / \mathrm { s }\).

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Definitions:

Discriminative Operant

A type of operant conditioning in which behavior is controlled by stimuli that signal the reinforcement of a behavioral response.

Behavioral Contrast

A phenomenon where the rate of response to a stimulus changes significantly due to the introduction of a reinforcement or punishment to another stimulus.

Discrimination Learning

A cognitive process where an individual learns to respond differently to various stimuli that are not identical.

Excitatory Generalization

The process whereby a conditioned response is observed not only to the conditioned stimulus but also to stimuli that are similar to the conditioned stimulus.