Hookes law

Question 1

what does Hookes law state

Answer 1

The extension of an elastic object is directly proportional to the force applied, up to the limit of proportionality

Question 2

Directly proportional means that

Answer 2

as the force is increased, the extension increases

Question 3

The limit of proportionality is the

Answer 3

point beyond which the relationship between force and extension is no longer directly proportional

Question 4

what type of relationship is Hookes law

Answer 4

linear

Question 5

what is elastic behaviour

Answer 5

is the ability of a material to recover its original shape after the forces causing the deformation have been removed

Question 6

what happens once something passes its limit of proportionality

Answer 6

undergoes deformation

Question 7

deformation can be (2)

Answer 7

elastic or inelastic

Question 8

what is deformation

Answer 8

is a change in the original shape of an object

Question 9

inelastic deformation

Answer 9

when the object does not return to its original shape after the deforming forces are removed

Question 10

is inelastic deformation permanent

Answer 10

yes

Question 11

is elastic deformation permanent

Answer 11

no

Question 12

elastic deformation

Answer 12

when an object returns to it original shape after deforming forces are removed from it

Question 13

how do you investigate Hookes law (springs and rubber bands)

Answer 13

• you need a clamp and stand, a ruler, a spring and rubber band, some masses, a mass hanger, a pointer and a G-clamp.
• Align the pointer to a value on the ruler with no mass added, and record this initial length of the spring / rubber band

Add the 100 g mass hanger onto the spring / rubber band

Record the mass (in kg) and position (in cm) from the ruler now that the spring / rubber band has extended

Add another 100 g to the mass hanger

Record the new mass and position from the ruler now that the spring / rubber band has extended further

Repeat this process until all masses have been added

Remove the masses and repeat the entire process again, until it has been carried out a total of three times, and an average length (for each mass attached) is calculated