The 10 lb block A
and the 20 lb block B are initially at rest. If a force of P = 10 lb is
applied to B as shown, determine the accleration of each block. The coefficient
of kinetic friction between any two surfaces is
m_{k}
= 0.2 and the coefficient of static friction is 1) 6.44 ft/s^{2} and
3.22 ft/s^{2} 

Since A slips on B
as B slips: For block B: S
F_{x} = ma_{x} (from the free body of B) So the accleration
of A, a_{A} = 6.44 ft/s^{2} 