block A (mass 2.04kg) rests on a tabletop. It is connected by a horizontal cord passing over a light, frictionless pulley to a hanging block B (mass 3.00kg ). The coefficient of kinetic friction between block A and the tabletop is 0.215.

Question

After the blocks are released from rest, find the speed of each block after moving 4.00cm .

Answer 1

m2•a=m2•g-T
m1•g=T-F(fr)
a• (m1+m2) = m2•g-F(fr)=m2•g-μ•m1•g
a=g• (m2-μ•m1)/(m1+m2)
v=sqrt(2•a•s)