Hooke’s Law

Question 1

What is Hooke’s law

Answer 1

The extension of a spring is directly proportional to the force applied

Question 2

What is extension

Answer 2

How much longer the spring is compared to its original length

Question 3

What does directly proportional mean

Answer 3

As one quantity increases, the other increases at the same rate

Question 4

What is the limit of proportionality?

Answer 4

• graph stops being proportional
• spring has reached its elastic limit
• spring will not return to the original shape when the force is removed

Question 5

What are the two ‘regions’ on a graph before and after the limit of proportionality?

Answer 5

Elastic and plastic

Question 6

How do you find the energy stored on a graph showing the limit of proportionality

Answer 6

Find the area of the elastic region
bxh/2
N on the bottom of the triangle, m on the side
MAKE SURE TO SHOW WHERE THE LIMIT OF PROPORTIONALITY IS TO MAKE IT EASIER

Question 7

What is elastic behaviour

Answer 7

Object will return to its original shape once the load is removed

Question 8

What is inelastic/plastic behaviour

Answer 8

Object will not return to its original shape once the load is removed

Question 9

What is spring constant (k)

Answer 9

How many newtons it would take to increase the length of the object by one meter

Question 10

What is deformation? What are the two types?

Answer 10

The change in an objects shape

Elastic + inelastic

Same as elastic + plastic behaviour