N= 2 Roster

8. Now choose two new different values of m, = (150 + 5.0 N) kg and m2 = (120 + 7.0N) kg. 9. Move the two masses as far away as possible from each other. After you have done this, your mass mi should be located at 21 = 0 position on the ruler . 2, and mass m2 the rightmost point with the coordinate x2 - 10m 10. Disable Force values Force Values by moving the circular dot checkmark from Scientific Notation Scientific Notation to Hidden O Hidden position. You screen should now look in the following way Force on m2 by m1 Force on m1 by m2 m1 m2 O meters 10 Mass 1 Mass 2 Force Values 20 kg 740 kg ID Decimal Notation 10 1000 1000 Scientific Notation Hidden Constant Size Gravity Force Lab 1) PhET : Figure 2: (Color online) Schematics for Step 10. 11. Calculate the gravitational force between your selected masses m1 = (150 + 5.0N) kg and m2 = (120 + 7.0N) kg for the following locations of mass m2: X2 = 10.0m, 9.0m, 8.0m, 7.0m, 6.0m, 5.0m, 4.0m, 3.0m, 2.0m and 1.5m. Make sure that you show the sample calculations for 2-3 different values of the distance 12 = $2 -21 in your report. Record your calculation results in the following Table: 12 = X2, m 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.5 F12, N Table 3. Calculated values of the gravitation force for the various positions x2 of the second mass m2. 12. Enable the Force values Force Values by clicking on Scientific Notation Scientific Notation checkmark. Now, you will be able to see the values of the gravitation force between the two masses. Verify your previously obtained results and complete a table similar to Table 3 with the experimentally obtained force values 12 = X2, m 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.5 F12, N Table 4. Experimental results for the gravitation force for the various positions 2 of the second mass m2. Even though you are supposed to obtained the same values of the theoretical and experimental results, there will be always some little discrepancy due to the calculation error. For the two cases of the smallest and the largest values of the distance 12 = 9.0 . 10 'm and 1.5 . 10-2m, calculate the percent error between the theoretical and experimental results for the gravitational force as % error = 2- (th) . 100% . (3) FOXP) + F12 13. Make a graph of the experimentally obtained force as a function of mass m2. What kind of a mathematical dependence do you see here