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The elastic limit of a material refers to:

The point at which the material remains unstretched.

The point at which the material becomes plastic.

The point at which the material cannot return to its original shape.

The point at which the material is perfectly rigid.

What is the potential energy stored in a spring with a spring constant of 100 N/m stretched by 2 meters?

200 J.

400 J.

50 J.

100 J.

What happens when the force on a spring exceeds the elastic limit of the spring?

The spring will snap into two pieces.

The spring will continue to stretch in a linear fashion.

The spring will return to its original shape.

The spring will experience permanent deformation.

Which of the following devices works based on Hooke's Law?

Spring scale.

Electric motor.

Windmill.

Pendulum.

The spring is elastic.

Which of the following statements is NOT true.

The elastic limit is not yet exceeded.

The extension is proportional to the deforming force.

When the 300 N is removed, the length will be 25 cm.

If the 300 N load is increased to 600 N the length will be 30 cm.