DoS (6)

Question 1

What is Deformation?

Answer 1

• Deformation is when forces change either the size or shape of a body
• It can also result in a change in the body’s motion

Question 2

What can happen if forces act in opposite directions?

Answer 2

• If they stretch a body (outwards), the forces are described as tensile
• If they compress a body (inwards), the forces are described as compressive

Tensile forces act to increase the length of an object.
Compressive forces act to reduce the length of an object in a given dimension.

Question 3

What can happen if a load is attatched to the end of a spring?

Answer 3

• A force is applied to the string
• Causes the string to extend or compress

Question 4

What is the natural length of the spring?

Answer 4

• The length of the spring without any force being applied (i.e. no compression or extension)

Question 5

Describe extension and compression.

Answer 5

• Extension is when a spring increases in length. The amount of extension can be calculated by subtracting the natural length from the extended length of the spring
• Compression is when a spring decreases in length. The amount of compression can be calculated by subracting the compressed length from the natural length

Question 6

What is the limit of proportionality?

Answer 6

• It is when the extension of the spring no longer has a proportional relationship to the force applied.