The 2.0-m-long, 15 kg beam in Figure P7.22 is hinged at its left end. It is "falling" (rotating clock- wise, under the influence of gravity), and the figure shows its position at three different times. What is the gravitational torque on the beam about an axis through the hinged end when the beam is at the 

a. Upper position? 

b. Middle position? 

c. Lower position?

Transcribed Image Text:

2.0 m 45° FIGURE P7.22 20°