Deformation

Question 1

State the effects of force (3)

Answer 1

1) Produces a change in the shape of the body as well as in its size
2) Produces a turning effect on the body
3) Make the body start to move as well as stop its motion

Question 2

What is extension?

Answer 2

The increase in length of an object when a force is applied

Question 3

Formulas to find extension (e)

Answer 3

e = length - original length
OR
e = 1 ÷ k x F

Question 4

What energy does the spring have?

Answer 4

Elastic potential energy

Question 5

State Hooke’s Law

Answer 5

Within the limit of proportionality, the extension produced (in a wire/spring) is directly proportional to the force

Question 6

Formula for Hooke’s Law

Answer 6

Force = ke

k=spring constant

Question 7

What is the limit of proportionality?

Answer 7

It is the point up to which the extension is proportional to the force

Question 8

What happens when a force is removed from a spring?

Answer 8

It regains its original length unless the limit of proportionality is exceeded