Forces and Elasticity Quiz

What is the unit of force in Hooke's law?

• Joules

• Newtons

• Meters

• Kilograms

What is the unit of spring constant in Hooke's law?

• Meters

• Joules

• Newtons per metre

• Newtons

What happens when an object increases in length?

• Compression

• Extension

• Deformation

• Elasticity

What does the limit of proportionality refer to in Hooke's law?

• The point where the extension is maximum

• The point where the spring constant is minimum

• The point where Hooke's law is no longer true

• The point where the force is maximum

What is the relationship between force and extension up to the limit of proportionality?

• Exponential

• No relationship

• Directly proportional

• Inverse

What happens to an elastic object when it is stretched beyond its elastic limit?

• It becomes more elastic

• It becomes stiffer

• It deforms permanently

• It returns to its original shape

Which type of material usually shows non-linear extension?

• Wood

• Rubber

• Clay

• Steel

What can be seen on a force-extension graph below the limit of proportionality?

• No relationship between force and extension

• Linear extension and elastic deformation

• Exponential extension and elastic deformation

• Non-linear extension and inelastic deformation

What can be seen on a force-extension graph above the limit of proportionality?

• Inverse relationship between force and extension

• Linear extension and elastic deformation

• Exponential extension and elastic deformation

• Non-linear extension and inelastic deformation

What is the gradient of a force-extension graph before the limit of proportionality equal to?

• The force

• The extension

• The spring constant

• The limit of proportionality