A Boxcar of Mass 200 Tons at Rest Becomes Uncoupled

question 84

Multiple Choice

A boxcar of mass 200 tons at rest becomes uncoupled on a 1.5° grade.If the track is considered to be frictionless,what speed does the boxcar have after 10 seconds?

• A)0.37 m/s
• B)0.59 m/s
• C)2.6 m/s
• D)4.3 m/s

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Definitions:

Spontaneous Recovery

Spontaneous recovery is a term in psychology referring to the reappearance of a previously extinguished conditioned response after a pause.

Reconditioning

The process of rebuilding physical strength and conditioning through specific exercises after a period of inactivity, illness, or injury.

Stimulus Generalization

The process by which a response conditioned to a specific stimulus becomes triggered by stimuli that are similar but not identical to the original stimulus.

Disinhibition

The reduction of restraint or inhibition which can lead to the expression of behaviors normally kept under control.