6.5.3 forces and elasticity

Question 1

What is elastic deformation?

Answer 1

Material which returns to its original shape after being deformed

Question 2

What is inelastic deformation

Answer 2

Material which does not return to its original shape after being deformed

Question 3

What is the equation for calculating force

Answer 3

Force (F, in newtons, N) = spring constant (K, newtons per metre, N/m) x extension (e, in metres)

Question 4

What happens when a force stretches (or compresses) a spring

Answer 4

The spring does work and elastic potential energy is stored in the spring

Question 5

Provided the spring is not inelastically deformed, the work done on the spring and the elastic potential energy are..

Answer 5

equal.

Question 6

What is a linear relationship

Answer 6

A straight line is created when plotted on the graph

Question 7

What is a non-linear relationship

Answer 7

A line which is not straight but instead a curve is created when plotted on a graph

Question 8

What is the equation for calculating spring constant

Answer 8

spring constant ( N/ m )= force applied ( N ) / displacement by the spring compressed

Question 9

What is the equation for calculating force

Answer 9

Force = —spring constant (-k) x amount of extension (x)

Question 10

What is the equation for calculating elastic potential energy

Answer 10

elastic potential energy = 0.5 x spring constant x (extension)²

Question 11

What is the limit of proportionality?

Answer 11

the limit of proportionality is the maximum amount of stress that an elastic spring can undergo before unfollowing Hooke’s law