elastic potential energy Flashcards
1
Q
what is elastic potential energy
A
the energy stored in a stretched spring
2
Q
what is it called when we apply a force to change the length of the spring?
A
doing work
3
Q
what is the equation for elastic potential energy
don’t rlly need to learn it it’s given in exam
A
Ee = 0.5 x k x e^2 Ee = elastic potential energy (J) K= spring constant (N/m) e^2= extension (m)
4
Q
what is doing work
A
applying a force to stretch and change the length of a spring
5
Q
what unit must the extension be in
A
metres
6
Q
A spring has an extension of 20 cm. Calculate the elastic potential energy stored in the spring (k= 100N/m)
A
20 000J
Ee= 0.5 x K x e^2
Ee= 0.5 x 100N/m x 20cm^2
Ee= 20 000J
7
Q
what is the unit for spring constant
A
N/m
