anonymous 3 years ago Friction problem

1. anonymous

|dw:1355575152488:dw|

2. anonymous

$\mu=\frac{F_F}{R}=\frac{4+5\sin(60)}{12-5\cos(60)}=0.877$

3. anonymous

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

4. anonymous

|dw:1355575315635:dw|

5. anonymous

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

6. anonymous

|dw:1355575432583:dw|

7. anonymous

Because $0.65+4 <8.33$

8. anonymous

Is this correct?