Energy Handout

2. Elastic P.E. - work stored in a deformed spring

a) General Equation PE _s = F × x

F = Average F needed to deform spring

x = __________________

b) Hooke’s Law - _____________needed to ___________ an ideal

spring, a given amount is directly ______________________ to its

__________________

Example) Ideal Spring X

F (force to deform) X (distance deformed)

2N .3m

4N ____

6N ____

8N ____

Force (N)

c) Spring constant for ideal Spring X

K = F/X =

d) Elastic P.E. = area of triangle under F vs. x graph

PE s =

e) PE_s in terms of k

1. P.E._s = __________ Average Force: ________

2. PE = ____________ F = Kx (On reference)

P.E._s = _______________ (On reference)

Ex1) A force of 12 N stretches a spring and makes it .15m longer.

a) What the spring constant (k) of this spring?

b) What's the potential energy of this spring?

B) Kinetic Energy - the energy an object possesses due to its _______________

Equation….. K E = ______________________

Relationships: K E / m _______________ KE/ v ________________