lesson 2 elastic potential energy (epe)

Question 1

what is elastic potential energy

Answer 1

the energy stored in a stretched stretched spring

Question 2

what is the equation of elastic potential energy

Answer 2

Ee= 1/2 k e2

Question 3

what is ‘epe’ measured in (elastic potential energy)

Answer 3

J (joules)

Question 4

what is ‘k’ measured in (spring constant)

Answer 4

N/m (newtons per metre)

Question 5

what ‘e2’ measured in (extension)

Answer 5

m (metres)

Question 6

when we stretch a spring, we’re applying a force to do what

Also applying a force like this is called doing what

Answer 6

change the length of the spring

called doing work

Question 7

we’re putting energy in to stretch the spring

the stretched spring is storing the energy, and that energy is called..

Answer 7

elastic potential energy

Question 8

if we apply a force to a spring what will happen

what is the stretch called

Answer 8

it will stretch

stretch is called extension

Question 9

if we plot the extension of the spring against a the force applied then we’d get what

what does this show

Answer 9

a straight line graph passing through zero

shows us that the extension is directly proportional to the force

Question 10

if we add too much force, what happens

what does this mean

Answer 10

the extension is no longer directly proportional to the force

this means the spring has been stretched beyond the limit of proportionality

Question 11

if the spring is beyond the limit of proportionality, what will happen to the spring

Answer 11

it is no longer able to return to its original length if we take away the force