EXAMPLE $4\mathrm{.}10$ A cylinder is supported by an inclined wall and a vertical bar, as shown in Figure $4\mathrm{.}15.$ The bar is pin$-$

connected to the wall at point A and connected to a flexible cable at point $B.$ All surfaces are smooth.

The cylinder weight $W$ is $2500$ lb $.$ Determine the reaction at point A and the pull in the cable at point $B.$

Neglect the weight of the bar.

Can you solve this problem with changing the weight of the cylinder to $6000$ lb $($instead of $2500$ lb$)$ and change the angle between cable and the horizon to $15$ degrees $($instead of $30$ degrees$)$