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→ υ<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
υ<br />
→<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
υ<br />
υ<br />
υ<br />
υ 1<br />
<br />
<br />
→<br />
F 1 <br />
<br />
→<br />
F 2 <br />
<br />
F → 1 <br />
<br />
<br />
→<br />
F 1 = ma → r<br />
a → r <br />
132<br />
przekrój ściany<br />
autobusu,<br />
o którą opiera się<br />
pasażer<br />
pasażer<br />
F 2<br />
1<br />
F 1