$(70\%)$ A pickup truck and a trailer have the weights and dimensions shown below.

a$)$ Fin the static axle loads of the truck and trailer when hooked together.

b$)$ Determine the three axle loads when the combination is accelerated by a force of $8200$ N

developed at the rear wheels of the truck.

c$)$ The truck is a rear wheel drive. Without the trailer connected, what horizontal pulling force

could it develop if the rear wheels are on a surface with a coefficient of friction, $=0\mathrm{.}6?$

Hint: Treat the truck as if it has a horizontal restraint acting at the hitch and take moments.

Remember that $F_{xr}=W_r$