Elastic force ck-12

The counter force exerted by an elastic material as it changes shape is known as _____ force.

__________ is the ability of a material to return to its original

Which of the following does not describe an object with high elasticity?

• A slinky that expands and contracts when held at one end.

• A spring that easily compresses when pushed.

• A rubber band that stretches when you pull it.

• A piece of paper that rips after pulling on it.

The ability of matter to return to its original shape after being stretched or compressed is called _____.

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

• 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.

Play objects with elasticity include

• spring toys

• silly putty

• modeling clay

• all of the above

When an elastic material is stretched or compressed, it exerts _____ force.

The less an elastic material is stretched or compressed, the greater the force it exerts.

• true

• false

An elastic material offers no resistance to forces that change its shape.

• true

• false

When an archer lets go of a bow's string, an arrow shoots in the opposite direction due to the elastic force of the released string and bow.

• true

• false