MATTER AND FORCE 159 



6. What property of matter is involved where one is thrown when stepping 

 off a moving car? Why should one face toward the front end of a 

 street car in alighting from it? 



7. Is the earth's pull upon a person (his weight) affected by having another 

 ' body come in between him and the earth? Is there any way in which 



to screen a person from the pull of the earth, i.e., of preventing the force 

 of gravity from acting upon him? What then is true of a person when 

 he is "losing weight"? 



8. What is a pound (a) of force; (b) of matter? 



