$8-17.$ If the coefficient of static friction between the rear wheels of the tractor and the ground is $\backslash (\backslash$mu$\_\{$s$\}=0\mathrm{.}6\backslash ),$ determine if the rear wheels slip or the front wheels lift off the ground as the engine provides a torque $\backslash ($ M $\backslash )$ to the rear wheels. What is the torque needed to cause the motion? The front wheels are free to roll. The tractor weighs $2500$ lb and has a center of gravity at $\backslash ($ G $\backslash ).$

Probs. $8-16/17$