This preview shows page 1. Sign up to view the full content.
83. The magnitude of torque is the product of the force magnitude and the distance from the pivot to the line of action of the force. In our case, it is the gravitational force that passes through the walker’s center of mass. Thus, . I rF rmg τα === (a) Without the pole, with 2 15 kg m I =⋅ , the angular acceleration is 2 2 2 (0.050 m)(70 kg)(9.8 m/s ) 2.3 rad/s . 15 kg m rF rmg II α == = = ⋅ (b) When the walker carries a pole, the torque due to the gravitational force through the
This is the end of the preview. Sign up to access the rest of the document.