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→ Fy-<br />
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F = mg sinα<br />
F N = mg cosα<br />
<br />
T k = f k F N = f k mg cosα<br />
F s<br />
T k<br />
F<br />
F N<br />
α<br />
F c<br />
<br />
F > T k -<br />
<br />
<br />
→<br />
F + → T k = m → a<br />
F − T k = ma<br />
mg sinα − mgf k cosα = ma<br />
a = g(sinα − f k cosα)<br />
α 0 -<br />
F → T → k <br />
<br />
F = T k<br />
mg sinα 0 = mg f k cosα 0<br />
f k =tgα 0<br />
f k <br />
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