10.3 Elastic Force

​10.3 Elastic Force

​Summary

• Elasticity is the ability of a material to return to its original shape after being stretched or compressed. When an elastic material is stretched or compressed, it exerts elastic force. This force increases the more the material is stretched or compressed.

• Elastic force has many uses, from hair scrunchies to bed springs.

​Elasticity and Elastic Force

​Something that is elastic can return to its original shape after being stretched or compressed. This property is called elasticity. As you stretch or compress an elastic material like a bungee cord, it resists the change in shape. It exerts a counter force in the opposite direction. This force is called elastic force. The farther the material is stretched or compressed, the greater the elastic force becomes. As soon as the stretching or compressing force is released, elastic force causes the material to spring back to its original shape.  

Multiple Choice

Which of the materials on the graph is the hardest to pull ??

• A

• B

• C

• None of them

Multiple Choice

Which material on the graph is the least stiff? (Easiest to pull)

• A

• B

• C

• None of them

Multiple Choice

Which material has the consistent stretch constant?

• A

• B

• C

• None of them

Multiple Select

What are the factors that effect elastic force?

• mass

• gravity

• material

• stretch/compression

Multiple Choice

Elastic force is created by the stretching or compressing of an elastic material.

• True

• False

Multiple Select

Which of the following would increase the elastic force acting on that object?

Select ALL that apply

• Moving a spring to an unstretched position.

• Compressing a spring twice as much as its starting position.

• Stretching a bungee cord 1.5x as much.

• Increasing the weight being vertically supported by a string.

Multiple Choice

From the choices below, what was the independent variable from the Investigating Elastic Force experiment?

• the elastic materials

• force in newtons

• the spring scale

• the wooden block

Multiple Choice

From the choices below, what was the dependent variable from the Investigating Elastic Force experiment?

• the elastic materials

• force in newtons

• the spring scale

• the wooden block