Gravitation 



FIG. 15. In this cylinder the center of weight is so high that it is not over 

 the bottom if the cylinder is tipped to any extent. So the cylinder falls over 

 easily and lies quietly on its side. 



er of wci 



FIG. 16. 



But in this one the center of weight is so low that it is over the base, 

 no matter what position the cylinder is in. 



