<span><span><span /></span><span><span /></span><span><span><span /></span><span><span /></span><span><span><span /></span><span><span /></span></span></span></span>
<span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span /></span></span></span></span></span></span></span></span></span></span></span><span /></span></span><span /></span></span></span></span></span><span><span /></span><span><span><span><span><span><span><span><span /></span></span></span></span></span></span><span><span /></span><span /><span><span><span><span><span><span>
x
</span></span></span></span></span></span><span><span><span><span><span><span>
a
</span></span></span></span></span></span><span><span><span><span /></span></span><span><span><span /></span></span></span><span><span><span><span><span><span><span><span /></span></span></span></span></span></span>
На тело массой m действуют
сила тяжести <span />, сила реакции опоры <span />и сила трения <span />(см. рис) Направим ось Х вдоль наклонной плоскости. Проецируя эти силы на ось х,
получим:
mg sina -Fтр = ma
<span>ð
</span><span>a
= g sin</span>a -Fтр/m
Угол a=30⁰,
поэтому ускорение
<span>ð
</span>a
= 9,8sin30⁰- 10/3 =1,6
Н
<span> </span></span></span>