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Question

The rod AB, of length 1 m, shown in the figure is connected to two soliders at each end through pins. The sliders can slide along QP and QR. If the velocity VA of the slider at A is 2 m.s, the velocity of the midpoint of the rod at this instant is m/s.

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Solution


ω3=ωAB=VAI13A=VBI13B=VCI13C
I13A= Distance between I13 and point A
I13B= Distance between I13 and point B
I13C= Distance between I13 and point C
VAI13A=VCI13C;2I13A=VCI13C
Applying sine law in triangle ABI13

1sin 120o=I13Asin 30o
I13A=sin3=osin120o
Applying sine lau in ΔACI13=0.5774
I13Csin30o=I13Asin90o
I13C=I13Asin30osin90o
=0.5774×0.5=0.2887 m
VC=VA.I13CI13a=2×0.28870.5774=1m/s

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