16.20: A uniform 10.0 m long plank is pivoted about its center of g
rmx9 *dxmd;,jj6ci25:k a,e un ymg-zravity. A mass M1 then is placed at the left edge of the plank and a second mass M2 is placed 1.0 m from the right end. This system is in static equilibrium (shown). If each mass now is moved 2.0 m
5 9d ;mdjj gmi:,e *x,2-yxcmkra6zuncloser to the center of the plank, which one of the following choices best describes the subsequent motion of the plank?