EXERCISE 64 



HOW TO MEASUEE THE WORK DONE BY THE FORCE APPLIED IN A PULLEY 

 SYSTEM IN RAISING A KNOWN WEIGHT A GIVEN DISTANCE 



Materials. Data from Exercise 63. 



Directions. Tabulate your results from Exercise 63, in the first arrangement of pulleys, as follows 



Calculate in centimeter grams the work done by the force applied to lift the weight a given 

 distance for the first pulley arrangement in Exercise 63. These calculations should be made accord- 

 ing to directions given in the textbook. 



Additional problems. Calculate the work done in lifting the weight through the same distance as above 

 by the second arrangement in Exercise 63. 



Make calculations for the third arrangement in Exercise 63. 



Compare the amount of work done in the three cases. 



Compare also the force applied and the distance through which the force is applied. 



What advantage, if any, is secured by using the first arrangement ? Do the other arrangements offer 

 any advantages ? 



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