Three Boxes Rest Side-By-Side on a Smooth, Horizontal Floor

question 93

Multiple Choice

Three boxes rest side-by-side on a smooth, horizontal floor. Their masses are 5.0 kg, 3.0 kg, and 2.0 kg, with the 3.0-kg mass in the center. A force of 50 N pushes on the 2.0-kg mass, which pushes against the other two masses. What is the contact force between the 3.0-kg mass and the 2.0-kg mass?

• A) 0 N
• B) 10 N
• C) 25 N
• D) 40 N
• E) 50 N

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Definitions:

Punishment

The imposition of a penalty or discomfort by an authority figure or system in response to an undesired behavior, aiming to decrease its occurrence.

Positive Reinforcement

A strategy in behavior modification that involves the addition of a rewarding stimulus following a desired behavior.

Conditioned Stimulus

A conditioned stimulus is a previously neutral stimulus that, after being associated with an unconditioned stimulus, evokes a conditioned response.

Fear Conditioning

A behavioral paradigm in neuroscience and psychology where organisms learn to predict aversive events, developing a conditioned response to a previously neutral stimulus.