Part 2/3.

Projectile Motion 4) Express your value for the density in the form p # Ap. You will find a detailed description of uncertainty calculations in the Uncertainty section at the front of the manual. Read this carefully before completing the following questions. 5) Express the radius and mass of the ball using relative (i.e., percentage) uncertainties. 6) Using the rules for combining uncertainties from the appendix, compute the volume of the ball using the values above. Express your uncertainty in relative (percentage) form. 7) Compute the density of the ball (with uncertainty) using the values above. Express your uncertainty in absolute form. 8) How does density value you calculated directly in part 7 compare to the value in part 4? (Note: for numbers that are uncertain, the word 'value' means 'range of values'.) 9) If you were redesigning the experiment to reduce the experimental uncertainty on the final value, would you focus on reducing the uncertainty on your measurement of the radius it the mass? Explain your answer. 10) The tabulated value for the density of steel is 7.8 [gicm3]. Does your value agree with tabulated value? If not, suggest some possible reasons for the discrepancy