Hook's Law and Elastic Potential Energy

What is potential energy?

• The energy an object has due to its position or condition.

• The energy an object has due to its motion.

• The energy an object has due to its chemical composition.

• The energy as object has due to its atomic structure.

Which type of potential energy causes the arrow to shoot from the bow?

• kinetic
• elastic
• chemical
• gravitational

The diagram shows the same spring being stretched at different lengths using different masses. At which length does the spring have the MOST potential energy?

• length A

• length B

• length C

• length D

Elastic potential energy is energy stored in an object, such as a spring, due to the object being stretched or compressed. In which position is it most likely that the spring has lost its elastic potential energy?

• W

• Y

• X

• Z

SELECT ALL POSTITIONS where the spring has STORED ELASTIC ENERGY

• W

• Y

• X

• Z

Elastic Potential Energy is _____________________________________.

• the ability of a material to return to its original shape after it has been stretched or deformed.

• potential energy that is stored due to the deformation of an elastic object, such as a stretched spring.

• energy stored in the bonds of chemical compounds. Chemical energy is released during chemical reactions.

• the energy contained within a system that is responsible for its temperature.

• the flow of thermal energy.

If F is force, k is spring constant and x is extension, Hooke's Law tells us that:

• F=k/x
• x=Fk
• k=Fx
• F=kx

Hooke's Law fails when a material reaches its:

• breakdown
• elastic limit
• end of tether
• fracture stress

A stiff material has a:

• high spring constant
• low spring constant
• spring constant of any value
• spring constant which is difficult to predict

A spring extends 1.5m under load 10N. What is its spring constant?

• 0.15N/m
• 10N/m
• 6.7N/m
• 15N/m