Learning goal: to step through the application of =0 to prevent a crane from tipping over. a crane of weight w has a length (wheelbase) c, and its center of mass is midway between the wheels (i. e., the mass of the lifting arm is negligible). (figure 1) the arm extending from the front of the crane has a length b and makes an angle ? with the horizontal. the crane contacts the ground only at its front and rear tires. while watching the crane in operation, an observer mentions to you that for a given load there is a maximum angle ? max between 0? and 90? that the crane arm can make with the horizontal without tipping the crane over. is this correct? later that week, while watching the same crane in operation, a different observer mentions to you that there is a maximum load the crane can lift without tipping, and you can find that maximum load by observing the minimum angle ? min that the crane arm makes with the horizontal. is this correct?