Homework Help: physics

Posted by george on Thursday, October 11, 2012 at 8:27pm.

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.

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

physics - Elena, Friday, October 12, 2012 at 3:22pm
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)
physics - Elena, Friday, October 12, 2012 at 3:23pm
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)

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