A Light Rope Passes Over a Light Frictionless Pulley Attached

question 15

Multiple Choice

A light rope passes over a light frictionless pulley attached to the ceiling.An object with a large mass is tied to one end and an object with a smaller mass is tied to the other end.Starting from rest, the heavier object moves downward, and the lighter object moves upward with an acceleration of the same magnitude.Which of the following statements is true for the system consisting of the two objects?

• A)The center of mass remains at rest.
• B)The net external force is zero.
• C)The velocity of the center of mass is a constant.
• D)The acceleration of the center of mass is g, downward.
• E)None of the above statements are true.

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Definitions:

Skinner--operant Conditioning

An adaptation process in learning where the level of a behavior's intensity is recalibrated through reward systems or disciplinary actions.

Pavlov--classical Conditioning

A learning process discovered by Ivan Pavlov that occurs through associations between an environmental stimulus and a naturally occurring stimulus.

Piaget--cognitive Development

The theory proposed by Jean Piaget that describes how children develop logical thinking through a series of stages.

Retrieval Cues

Stimuli or signals that can trigger the recall of information from memory.