90 ELEMENTARY GENERAL SCIENCE PH. vi 



stable, unstable, and neutral equilibrium. What is the condition 

 which determines the nature of the equilibrium ? 



9. Describe an experiment which exemplifies each of the terms in 

 the preceding question. 



10. Give instances of bodies in stable, unstable, and neutral equi- 

 librium. 



11. How would you determine the centre of gravity of an iron 

 hoop made by joining two semi-circles, one thicker than the other ? 

 Explain how the observations could be used to find out which was 

 the thicker half of the hoop. 



