Hooke's Law

How do you know if an object is elastic?

• If it springs back to its original shape.

• If it increases its length.

• If it is squishy.

• If it is flexible.

Which is an elastic object?

• bread

• paper

• a basketball

• a shoe

What is extension?

• The extent to which an object can be stretched without permanently altering its size or shape.

• A measure of how stiff or strong a spring is.

• The increase in the length of something.

• When an object springs back to its original shape.

Tags

CCSS.L.8.4A

CCSS.RI.8.4

What happens if you apply a small force to a spring ?

• It will stretch only a small amount.

• It will stretch more.

• Springs don't stretch.

• What is a spring?

The extension of a perfectly elastic object is directly proportional to ___________.

• the elasticity

• the elastic limit

• the speed

• the force applied

What is Hooke's law formula?

• M= Fd

• S= d/t

• F= ke

• F=ma

How can we know the elastic limit?

• if the object is stretched too much and does not return to its original shape.

• If the object is stretched too much and returns to its original shape.

If the spring constant is 40N/m and a spring is stretched by 0.4m, how much force has been applied?

• 100Nm

• 100N

• 16N

• 16Nm

What force would be needed to extend a spring with a spring constant k= 20 by an extension of 0.3m2?

• 6

• 66.6N

• 6N

• 66.6