A Rectangular Block Is Moving Along a Frictionless Path When

question 30

Multiple Choice

A rectangular block is moving along a frictionless path when it encounters the circular loop as shown. The block passes points 1,2,3,4,1 before returning to the horizontal track. At point 3:

• A) its mechanical energy is a minimum
• B) the forces on it are balanced
• C) it is not accelerating
• D) its speed is a minimum
• E) it experiences a net upward force

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Definitions:

Neutral Stimulus

A stimulus that initially produces no specific response other than focusing attention, until it is associated with an unconditioned stimulus.

Reinforcement

In behavioral psychology, it refers to any stimulus which strengthens or increases the probability of a specific response.

Positive Reinforcer

A stimulus that, when presented after a behavior, increases the likelihood of that behavior being repeated.

Negative Reinforcer

A stimulus whose removal or avoidance after a response strengthens that response or makes it more likely to happen again.