The tractor is used to push the 1500-lb pipe. To do this it must overcome the frictional...

The tractor is used to push the 1500-lb pipe. To do this it must overcome the frictional forces at the ground, caused by sand. Assuming that the sand exerts a pressure on the bottom of the pipe as shown, and the coefficient of static friction between the pipe and the sand is = 0.3, determine the horizontal force required to push the pipe forward. Also, determine the peak pressure p₀.