Find the acceleration and tension in the string for the system above.
We start by drawing all the forces acting on each particle.
Resolving Perpendicular to the slope for P:
R-3g cos 30=0 rightarrow R=3g cos 30
Applying F=ma for P:
T-%mu R -3gsin 30 =3a
T-3 %mu gcos 30 -3gsin 30 =3a (1)
Applying F=ma for Q
2g-T=2a (2)
+(2)
Then from (2)