Gravitation 



33 



weight up (Figs. 15 and 16) makes an object less 

 stable. 



The two main points to remember about stability 

 are these : the wider the base of an object, the harder 

 it is to tip over ; and the lower the center of the weight 

 is, the harder it is to tip over. 



If you were out in a rowboat in a storm, would it be 

 better to sit up straight in the seat or to lie in the bottom 

 of the boat? 



Why is a flat-bottomed boat safer than a canoe? 



Where do you suppose the center of weight of the 



FIG. 1 8. Which vase would be the hardest to upset? 



