180 EXPERIMENTAL GENERAL SCIENCE 



41. When one is carrying a bucket of water or other heavy object in 

 one hand, why is the other held away from the body? 



42. Why do we lean forward when walking up hill? 



43. Why do we swing our arms when we walk? 



44. Stand with your back to the wall and without moving the feet, 

 try to pick up an object placed at the toe of your shoe. Explain your 

 failure. 



45. Explain how "walking is a perpetual falling." 



46. What causes the great pressure at the bottom of the ocean? 



