Question detail

Forces and elasticity scenario: two trolleys collide and momentum is compared before and after. Which answer best addresses Elastic potential energy and the objective to describe elastic potential energy as energy stored in a stretched or compressed elastic object?

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 collision scenario, apply energy store to describe elastic potential energy as energy stored in a stretched or compressed elastic object while keeping elastic versus plastic deformation separate.
B. In the collision scenario, mix up elastic versus plastic deformation and ignore energy store.
C. Use a general revision statement without applying Elastic potential energy to the situation.
D. Choose a different forces topic instead of explaining describe elastic potential energy as energy stored in a stretched or compressed elastic object.

Answer

The correct answer is: In the collision scenario, apply energy store to describe elastic potential energy as energy stored in a stretched or compressed elastic object while keeping elastic versus plastic deformation separate.

Explanation

The correct option is In the collision scenario, apply energy store to describe elastic potential energy as energy stored in a stretched or compressed elastic object while keeping elastic versus plastic deformation separate.. It is correct because the scenario says two trolleys collide and momentum is compared before and after, which must be interpreted through Elastic potential energy. This directly supports the learning objective to describe elastic potential energy as energy stored in a stretched or compressed elastic object. Use values 2, 10, and 18 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 Elastic Potential Energy

Students often confuse elastic potential energy with the total energy of the object, not recognizing it as the energy stored specifically in a stretched or compressed elastic object.

Emphasize that elastic potential energy is only the energy stored due to deformation and is distinct from other forms of energy the object may possess.

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