Question Two $(8$ Marks$)$

Crank $2$ of the push$-$link mechanism shown in the figure is driven at ${}_2=60ra\frac{d}{s}$ in $($CW$)$ direction. Using the instant center method

a$)$ Locate all instant centers

$(6$ Marks$)$

b$)$ Find the velocities of points B

$(0\mathrm{.}5$ Mark$)$

c$)$ Fond the velocity of point $C$

$(0\mathrm{.}5$ Mark$)$

d$)$ Find the angular velocity of link $3(0\mathrm{.}5$ Mark$)$

e$)$ Find the angular velocity of link $4(0\mathrm{.}5$ Mark$)$

$O_{2}A=15cm,O_{4}B=30\mathrm{.}1cm,AB=29\mathrm{.}5cm$

$AD=14\mathrm{.}75cm,DC=7\mathrm{.}5cm,O_2{O}_4=7\mathrm{.}5cm$

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