Question detail

Forces and elasticity scenario: a car driver reacts, brakes, and transfers kinetic energy thermally. Which answer best addresses Hooke's law and spring constant and the objective to use the equation force = spring constant x extension?

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 car braking scenario, apply force to use the equation force = spring constant x extension while keeping elastic versus plastic deformation separate.
B. In the car braking scenario, mix up elastic versus plastic deformation and ignore force.
C. Use a general revision statement without applying Hooke's law and spring constant to the situation.
D. Choose a different forces topic instead of explaining use the equation force = spring constant x extension.

Answer

The correct answer is: In the car braking scenario, apply force to use the equation force = spring constant x extension while keeping elastic versus plastic deformation separate.

Explanation

The correct option is In the car braking scenario, apply force to use the equation force = spring constant x extension while keeping elastic versus plastic deformation separate.. It is correct because the scenario says a car driver reacts, brakes, and transfers kinetic energy thermally, which must be interpreted through Hooke's law and spring constant. This directly supports the learning objective to use the equation force = spring constant x extension. Use values 7, 14, and 19 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

Common Mistake in Hooke's Law

Students often confuse the spring constant with the force applied, leading to incorrect calculations of extension.

Remember that the spring constant (k) is a measure of stiffness and should be used as a multiplier in the equation F = k x e, where F is the force and e is the extension.

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