A Spring Scale Is Fastened to the Ceiling of a Railway

question 46

Multiple Choice

A spring scale is fastened to the ceiling of a railway car. When a 1.0-kg block is hung from the scale, it reads 12 N and is oriented as shown in the figure. What is the approximate acceleration of the car as measured by an observer at rest on the ground outside of the car?

• A)7 m/s² to the right
• B)7 m/s² to the left
• C)12 m/s² to the right
• D)12 m/s² to the left
• E)It is impossible to calculate since the angle \(\theta\) has not been given.

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Definitions:

Echoic Memory

A subtype of sensory memory that retains auditory information for a short period after the original sound is heard.

Fleeting Memory

A brief or rapidly fading memory, often unable to be recalled after a short period of time.

Paying Attention

The act of focusing cognitive resources on a particular stimulus or task, while filtering out distractions.

Professor's Lecture

An educational talk given by a professor to students, usually as part of a university or college course, intended to convey knowledge on a particular subject.