EXERCISE 65 

 HOW MUCH WORK IS DONE UPON THE WEIGHT (WORK OUT) IN EXERCISE 63? 



Materials. Data from Exercise 63. 



Directions. Secure from the first pulley arrangement in Exercise 63 the following data: 



Calculate the work done upon the weight. 



Additional problems. In a manner similar to the above determine the amount of work accomplished 

 upon the weight if it is lifted the same distance by use of each of the three arrangements of pulleys. Does 

 the work accomplished differ in each of the three cases ? 



Can you determine the amount of work done in the second additional problem in Exercise 63 ? 



[93] 



