Forces: Forces and Elasticy.

Question 1

What happens when you apply a force at the end of a elastic material?

Answer 1

• Stretching forces are equal in magnitude but opposite in direction.
• Forces causes the object to stretch.
• ## Elastic materials will always return to their original length or shape if we take away the forces acting on them.

Question 2

What happens when you apply a squeezing force to an elastic material?

Answer 2

• The material compresses.

- Take away forces: Returns to original length.

Question 3

What happens when you apply 3 forces to the elastic material?

Answer 3

• The material bends.

- When you remove the forces; returns to original length and shape.

Question 4

What are changes to an elastic material called?

Answer 4

• Elastic deformation.
• In order to change an objects length or shape, we have to apply more than one force.
• Apply one force to stationary object: Forces are no longer balanced.
• Object will move. Not change shape or length.

Question 5

What happens when you stretch inelastic materials?

Answer 5

• Do not return to their original length when forces are removed.
• ## These changes are called inelastic deformation.

Question 6

How do we calculate the force needed to stretch an elastic object?

Answer 6

• Force (N)= Spring Constant (N/m) x extension (m).

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Question 7

How do we calculate the compression when an elastic object is squeezed?

Answer 7

• Force (N)= K (Spring Constant N/m) x compression (e M).