A Ball Player Wishes to Determine Pitching Speed by Throwing

question 16

Multiple Choice

A ball player wishes to determine pitching speed by throwing a ball horizontally from an elevation of 5 m above the ground.The player sees the ball land 20 m down range.What is the player's pitching speed?

• A)about 5 m/s
• B)about 10 m/s
• C)about 20 m/s
• D)about 25 m/s
• E)none of these

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Definitions:

Systematic Desensitization

A behavioral therapy technique used to reduce phobic reactions through gradual exposure to the feared object or situation.

Spontaneous Recovery

The reappearance of a previously extinguished conditioned response after a period of time without exposure to the conditioned stimulus.

Mental Representation

An internal image or concept of an external reality or abstract idea.

Extinct Conditioned Responses

The process by which a conditioned response becomes weaker or disappears after the conditioned stimulus is repeatedly presented without the unconditioned stimulus.