A Box of Mass M Is Pressed Against (But Is

question 27

Multiple Choice

A box of mass m is pressed against (but is not attached to) an ideal spring of force constant k and negligible mass,compressing the spring a distance x.After it is released,the box slides up a frictionless incline as shown in the figure and eventually stops.If we repeat this experiment but instead use a spring having force constant 2k

• A)the box will go up the incline twice as high as before.
• B)just as it moves free of the spring,the kinetic energy of the box will be twice as great as before.
• C)just as it moves free of the spring,the speed of the box will be times as great as before.
• D)All of the above choices are correct.
• E)None of the above choices is correct.

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Definitions:

Brain Stem

The central trunk of the mammalian brain, responsible for regulating basic life functions like heartbeat and breathing.

All-or-none Principle

A principle that states that neurons fire at their maximum intensity or not at all, depending on whether the stimulus reaches a certain threshold.

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An inhibitory neurotransmitter in the central nervous system that plays a key role in regulating neuronal excitability.

Anxious

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