Physics hooke's law

Hooke's Law describes the behaviour of which kind of material under tension?

• plastic
• metals only
• elastic
• non-metals only

Hooke's Law fails when a material reaches:

• breakdown
• its elastic limit
• end of its tether
• fracture stress

Hooke's law describes how as the force increases the rate of increase of ............ is the same.

• the length of a spring
• gravity
• the extension of a spring

A graph of extension against force for an elastic material is:

• A downward curve
• An upward curve
• A straight line from any point on the x and y axis
• A straight line from the origin

If extension = Stretched length - original length. What is the extension of spring D.

• 1mm
• 2mm
• 3mm
• 0mm

A stiff material has a:

• high spring constant
• low spring constant
• spring constant of any value
• spring constant which is difficult to predict

A spring has a spring constant of 5N/cm.  What is its extension when loaded with 15N?

• 4cm
• 5cm
• 3m
• 3cm

A force of 100N is applied to a spring with a spring constant of 2N/m. How far will the spring extend?

• 200m

• 5cm

• 50m

• 0.02m

How far will a bungee rope extend if it has a spring constant of 5N/m and a force of 20N is applied to the rope?

• 100m

• 100cm

• 4m

• 40m

What is the best description of the relationship shown in this graph?

• In this graph, the relationship between force and extension is linear.

• In this graph, the relationship between force and extension is non-linear.

• In this graph, the relationship between force and extension is directly proportional.

• In this graph, there is no relationship between force and extension.