The fits generated by Fig. 3 and Fig. 4 are used to
determine the total effect of string drag. The slope of
the straight line fits give the dependence of total drag on
the various parameters. Since the string length was the
only vaiable changed in trial one, the slope detemines the
effect of string length on total drag. The same can be said
for bob size and total drag in trial 2. Dividing the slope of
string length dependence and bob diameter dependence
give the same ratio as in Eq. 7. For the parameters used
in this experiment γs
γb
= 0.05 which gives a percent of
total drag attributed to the string of 5% ± 4%.