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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The Second Special Class of Problems: Find Equilibrium Acceleration<br />
a r<br />
f r k<br />
r<br />
r r<br />
r r<br />
r<br />
F = n + T + w + f =<br />
ma<br />
net<br />
T − f − w sinθ<br />
=<br />
ma<br />
n − w cosθ<br />
=<br />
0<br />
T = 20N<br />
is given<br />
m = 1kg ⇒ w = mg ≈ 10N<br />
is given<br />
k<br />
k<br />
r<br />
a =<br />
r<br />
F net<br />
m<br />
θ =<br />
0<br />
30<br />
is given<br />
Then:<br />
= θ<br />
= =<br />
0<br />
n = w cos = 10cos 30 =<br />
8.7N<br />
T − fk<br />
− w sinθ<br />
20 − fk<br />
−<br />
5<br />
a<br />
= =<br />
m<br />
1<br />
?<br />
7