- #1
zombiengineer
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Homework Statement
Two blocks are connected by a string (through a frictionless massless pully) block 1 is on an inclined plane, while block two is hanging from the other end of the string.
m1 = 20kg, theta =53.1, friction between the block and the inclinde is [itex]\mu[/itex]k =.4
what is m2 such that it must be decended 12m in 3 s after the system is released from rest?
Homework Equations
sumF= ma
w=mg
The Attempt at a Solution
block 1 = sumF sub x =Ft-Fuk-Fgcos53.1
"""""""" = sumF sub y = Fn-Fgsin53.1=0
block 2 = sumF= Ft-Fg = ma
assuming Ft sub1 = Ft sub 2, due to the frictionless pully
Fgcos53.1+Fuk=Fg+ma
28kg*a=m*a+Fg ?
is this right so far?
I have no clue where to go from here :S