h t t p : / / b i t . l y / 9 S F F F o
a) What is the minimum value of F needed to move the two blocks?
b) If the force is 10% greater than your answer for (a), what is the acceleration of each block?
The force opposing F is friction on the two blocks.
on the bottom: Fn*mu= (3+5)g*mu
on the top: Fn*mu=3g*mu
add them, that is the friction that must be overcome.
Now, if the Force is greater, then
Net force=(total mass*acceleration)
.1*totalfriction=total mass*acceleration
solve for acceleartion.