This preview shows pages 1–3. Sign up to view the full content.
Δ
x
0
x
μ
k
μ
k
=0
k
A mass
m
is attached to a spring with known spring constant of
k,
compressed a
distance
x,
and then released as shown in the Fgure.
The mass slides over a
rough patch with coefFcient of kinetic friction μ
k
until it passes the equilibrium
point of the spring and then slides along a frictionfree track up an incline.
What
was the maximum height the mass traveled up the incline as measured vertically
from its starting position in terms of the known variables given above?
Question:
This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentΔ
x
0
x
μ
k
μ
k
=0
k
When presented a motion problem you should always ask yourself if it's possible
to use conservation of energy before setting it up as a purely Newton's laws
problem.
Think about the variables given and what you're trying to solve for.
In
this case we are asked to Fnd a height and are not told anything about
accelerations or time.
Gravitational potential energy is directly proportional to
height so we know it's possible to solve using energy concepts.
In this case, we should use conservation of energy to solve the problem, and the
This is the end of the preview. Sign up
to
access the rest of the document.
 Fall '08
 staff
 Energy, Friction, Mass

Click to edit the document details