and Results 0.028kg Mass, m (kg) Radius of path, r (m) 0.om Number of revolutions, B 20 Hanging Mass (kg) Trial 1 Time Trial 2 Time (s) Trial 3 Time Trial 4 Time Trail 5 Time 50kg (s) (s) (s) 11.78 GOW 10.43 7Okg 22 (s) 9.89 1.68 9.56 842 8.19 9.25 10.1) 9.26 9.70 8.१० 8.90 11.93 9.38 9.48 860 9.18 9. 72 9.41 9.25 9ÖKG 9.32 9.0a 9.16 Table 1: Experimental Data Y Hanging Centripetal Average Total Force Linear Speed Squared Time for one Linear Speed Mass Time revolution F= Mg tavg T= tavg/B v = 2tr/T v? (kg) (N) (s) (s) (m/s) (m/s)) 46.24 GG.68 0.5539 0.4835 0.4659 0.4402 6.80 490N I1.018 60 Kg 588N 9.67 70Kg 686N 9.318 80 Kg 784N 8.804 9o kg 882N 8.102 0.408 7.79 8.08 8.56 73.27 9.23 85.19 65.28 Table 2: Experimental Results 50 boxes elal Force- 7.84 or 15.68 any # between Speed 0.779 or l. 558 red 2 ony # between Graphing Lab a convenient method to show the relationship without using formulas. Although it is easier to A graph is a pictorial representation of the relationship between two physical values. It is show the relationship with a picture, we must be careful how we draw this picture if we are to obtain an accurate portrayal of the relationship. 1) Draw axes on graph paper. Be sure to leave room on left of graph and at the bottom of the graph for labeling. 2) Determine minimum x-scale. (тахiтит х - value) - scale = minimum x - (minimum x – value) number of boxes along x- axis 38 3) Choose x-axis scale. Your x-axis scale must be no less than the minimum x-axis scale and no greater than twice the minimum x-axis scale. minimum x – scale < x- scale < 2x(minimum x – scale) 490 4) Apply scale to x-axis. I recommend that the lowest value on your x-axis be just a little lower than your lowest x-value. You do not need to label every line. 5) Determine minimum y-scale. (тахiтит у - value) number of boxes along y- axis (minimum y – value) minimum y- scale : 6) Choose y-axis scale. Your x-axis scale must be no less than the minimum x-axis scale and no greater than twice the minimum x-axis scale. minimum y – scale < y-scale < 2×(minimum y – scale) 7) Apply scale to y-axis. I recommend that the lowest value on your y-axis be just a little lower than your lowest y-value. You do not need to label every line. 8) Label axes. Label your x and y axes. Don't forget to state your units. 9) Plot your data. 10) Draw the best-fit line through your data. Your line should approximate what the data is doing. DO NOT CONNECT THE DOTS! Some of your points may fall on the line, others won't. A good line will have some points above it and some below it but all of the points should be close to the line. 11) Calculate the slope of your line. Choose two spots on your line for whom the coordinates will be able to ascertain and use them to calculate the slope. Call one of the points A and the other point B (it doesn't matter which point is A and which point is B). Don't forget your units. Ув — Ул Хв — ХА slope =