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henpen
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dw:1355575152488:dw

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\[\mu=\frac{F_F}{R}=\frac{4+5\sin(60)}{125\cos(60)}=0.877\]

henpen
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dw:1355575247470:dw What is the acceleration of each of the blocks now?

henpen
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dw:1355575315635:dw

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\[F_2=R\mu=9.5*0.877=8.33\]So no acceleration of the bottom thing. Is this correct?

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dw:1355575432583:dw

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Because \[0.65+4 <8.33\]

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Is this correct?