$5\mathrm{.}4$ Frames and Pulleys and Winches $-$ oh my$!$

The wall crane supports a load of $700$ lb $.$

The jib ABC weighs $100$ lb $,$ and member

$BD$ weighs $40$ lb $-$ both being uniform so

their C$.$O$.$G$.$s are at their middle points.

Determine the horizontal and vertical

components of reaction at the pins A and

D$.$ Also, what is the force in the cable at

the winch $W?$

IS$.$