This preview shows pages 1–5. Sign up to view the full content.
Chapter 8
Potential energy and conservation
of energy
1
PHYS 2101, P.M.Shikhaliev
LSU,
Fall 2010
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document Sample problem 3: Conservation of mechanical energy
A chain with total mass
m
and length
L
is
hanging with length
d
over the edge of the
frictionless table. How much work is required
to pull hanging part of the chain back onto the
table?
2
PHYS 2101, P.M.Shikhaliev
LSU,
Fall 2010
d
L – d
Sample problem 3: Conservation of mechanical energy
A chain with total mass
m
and length
L
is
hanging with length
d
over the edge of the
frictionless table. How much work is required
to pull hanging part of the chain back onto the
table?
3
PHYS 2101, P.M.Shikhaliev
LSU,
Fall 2010
d
Solution:
Force applied to pull out the chain is
variable. If length of the hanging part is
x
,
then
Work equals:
L – d
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
The potential energy of a diatomic molecule
O
2
is given by
expression
where r is the distance between the two atoms and
A
and
B
are
positive constants.
(a)
Find the equilibrium distance
r
0
where the
force between two atoms is zero.
(b)
Is the force repulsive or
attractive when the separation is smaller and larger?
4
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 09/30/2010 for the course PHYS 2101 taught by Professor Grouptest during the Spring '07 term at LSU.
 Spring '07
 GROUPTEST
 Physics, Conservation Of Energy, Energy, Friction, Mass, Potential Energy

Click to edit the document details