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A four bar mechanism is shown in the figure. The link numbers are mentioned near the links. Input link 2 is rotating anticlockwise with a constant angular speed $\omega_2$. Length of different links are:



The magnitude of the angular speed of the output link $4$ is $\omega_4$ at the instant when link $2$ makes an angle of $90^{\circ}$ with $O_2O_4$ as shown. The ratio $\frac{\omega_4}{\omega_2}$ is _____ (round off to two decimal places).


in Theory of Machines by (21.2k points) 4 36 102
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Sir, please provide proper ans key range given from IIT MADRAS as 0.78 to 0.80 .
by (140 points) 2
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