Laws of MotionHard
Question
In the Figure, the pulley P moves to the right with a constant speed u. The downward speed of A is vA, and the speed of B to the right is vB.
Options
A.vB = vA
B.vB = u + vA
C.vB + u = vA
D.the two blocks have accelerations of the same magnitude
Solution
by string constrain
vA + u − vB = 0
or vB = u + vA
differentiating both side
aB = 0 + aA Ans.
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