Table 6
Formulas. Will be used standard formula (1.1). Calculating Experiment 2.1. For calculating, formula (1.1), was changed for the Experiment 2.1:
Now substitute inside the formula (2.2) values form Table 5 and Table 6 for Experiment 2.1:
Using some simplification:
Calculating Experiment 2.2 For calculating, formula (1.1), was changed for the Experiment 2.2:
Now substitute inside the formula (2.1.2) values form Table 5 and Table 6 for Experiment 2.2:
Using some simplification:
In formulas (2.2.2) and (2.2.3), result is two unknown values. To find them should to subtract formula (2.2.2) from formula (2.2.3):
Hence,
Were found value of the mass, then by substitution value mass of the bar into the formula (2.2.3), can be found the COM:
Hence, mass and COM of bar were found. Experiment 2.1 and Experiment 2.2 is done. Part D2 (Calculating Errors) The original mass of the irregular shaped bar is 249 Compare to experimental result, can be clearly seen that was made some errors during the Experiments. Hence, errors should be calculated in the percentage. Error of mass:
Error of the COM:
|
(Formula 2.2)
(Formula 2.2.2)
(Formula 2.1.2)
(Formula 2.2.3)
and COM is 35.5cm.
