Chapter 6. Dynamics I: Motion Along a Line
Chapter 6. Dynamics I: Motion Along a Line
Chapter 6. Dynamics I: Motion Along a Line
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Kinetic friction:<br />
k k<br />
f<br />
µ n<br />
Friction<br />
= k<br />
µ - coefficient of kinetic friction<br />
n<br />
- normal force<br />
Find acceleration,<br />
( T > T )<br />
max<br />
y<br />
weight,<br />
r<br />
r r r<br />
r<br />
r<br />
F = n + w + T + f =<br />
ma<br />
net<br />
n<br />
− w<br />
=<br />
0<br />
− f + T =<br />
ma<br />
k<br />
k<br />
f r s<br />
x<br />
n r<br />
w r<br />
a r<br />
T<br />
r<br />
friction<br />
tension<br />
n<br />
= w then fk = µ kn =<br />
µ<br />
kw<br />
normal<br />
a<br />
T −<br />
fk<br />
T −<br />
µ<br />
kw T<br />
= = = −<br />
µ<br />
k<br />
g<br />
m m m<br />
11
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