Figure P$-3-5\mathrm{.}5$

$1200$ tb

Figure P$-3-5\mathrm{.}6$

$3-5\mathrm{.}6.$ The weight of the trapezoidal block is $7200$ lb acting where

shown in Fig. P$-3-5\mathrm{.}6.$ The ground reaction varies uniformly from an inter$-$

sity of $p_{A}l\frac{b}{f}t$ at $A$ to $p_{B}I\frac{b}{f}t$ at $B.$ Determine $p_A$ and $p_B.$

$p_A=900l\frac{b}{i}t$;$p_B=300l\frac{b}{f}t$

II$.$ SOLVE THE FOLLOWING: Show your solutions clearly and orderiy.

If two coplanar forces of magnitude $12$ N and $16$ N are acting at a point with an angle of $120$ degrees

between them, what is the magnitude and direction of the Resultant?

Determine the pin reaction at A and at $B$ as shown in the figure;

$100$ N

$70*+$

$50$ N