A Box of Mass M Is Pressed Against (But Is

question 44

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:

Cephalocaudal Pattern

A developmental principle where growth and skill development proceed from the head downward through the body.

Proximodistal Pattern

A pattern of growth and development in humans where development proceeds from the center of the body outward to the extremities.

Growth

The process of increasing in size, number, value, or strength.

Parturition

The process of giving birth to offspring.