Question detail

Forces and elasticity scenario: air resistance changes until terminal velocity is reached. Which answer best addresses Stretching and deformation and the objective to describe extension as the increase in length of an object when stretched?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Forces and elasticity

Question

A. In the parachutist scenario, apply extension to describe extension as the increase in length of an object when stretched while keeping elastic versus plastic deformation separate.
B. In the parachutist scenario, mix up elastic versus plastic deformation and ignore extension.
C. Use a general revision statement without applying Stretching and deformation to the situation.
D. Choose a different forces topic instead of explaining describe extension as the increase in length of an object when stretched.

Answer

The correct answer is: In the parachutist scenario, apply extension to describe extension as the increase in length of an object when stretched while keeping elastic versus plastic deformation separate.

Explanation

The correct option is In the parachutist scenario, apply extension to describe extension as the increase in length of an object when stretched while keeping elastic versus plastic deformation separate.. It is correct because the scenario says air resistance changes until terminal velocity is reached, which must be interpreted through Stretching and deformation. This directly supports the learning objective to describe extension as the increase in length of an object when stretched. Use values 3, 11, and 20 only if the question asks for a calculation. The answer earns credit by naming the relevant force or motion quantity, using units when needed, and avoiding the boundary error elastic versus plastic deformation.

Common mistake

Misunderstanding Extension

Students often confuse extension with total length, thinking that extension is the final length of the object after stretching.

Extension should be defined as the increase in length from the original length, so students should practice calculating extension by subtracting the original length from the new length.

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