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electricblue
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Homework Statement
In the pulley-cable system shown, the acceleration of block A, x(double dot), varies with time, t(in seconds), as given by the expression x(double dot) = 2t m/s2. initially the two blocks are 5m apart and both are stationary.
http://img3.imageshack.us/img3/2074/pulleycable.jpg"
i)what is the acceleration, y(double dot), of block B at time t?
ii)what is the velocity of block B when t = 3s?
iii)how far apart are the blocks when t = 3s?
Homework Equations
F= ma
Length of rope = constant
The Attempt at a Solution
F=maaa
2 T = ma2t
T = mat
F=mbab
3/2 T = mbab
3/2 mat = mbab
ab = (3mat)/(2mb)
is it correct for part (i)?
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