Question

9. What do you think are most likely reasons for the difference between the experimental and accepted values? 13 marks 10. Suppose that the centripetal force acting on an object in circular motion were doubled to a new value, and the object remained in a circular path with the same radius. How would the motion be affected? 13 marks Observations and Data; 17 marks time for 20 Centripe 1/T2 tal force (s2) Number of washers revolutions F/R (N/m) T (s) (N) 1.91 0-23 38 2 O 49 0.23 10 0.98 0.55 1.35 23 O.54 1105 15 0-82 O82 1-43 22.1 1.1 0.955 1.96 1.1 20 19.1 1.37 O.855 1.36 a5 2.45 0.a8 2.94 1-64 1-63 30 15.6 Analysis and Results: 42R mp2 2mR it follows that From the equations F T2- and x m Fc T R As a straight line graph has the equation Y = gradient x X + C, it follows that a graph with T2 on the X-axis and F/R on the Y-axis will have a straight line with the gradient 4x m, where m is the mass of the ball. Calculate the centripetal force for each set of data and record this in the Data Table (for this experiment 1. 12 marks the centripetal force is the weight of the washers). Show one complete calculation. weight of wa Shers Centripetal fore mass5(10)= 50 9-kg m=0-05 kg = Fc W= 0.05 x9-8 O-49 2. Calculate 1/period for each set of data and record this in the Data Table. [2 marks 3. Convert the radius into units of meters. Radius= 1.3 12 marks Calculate centripetal force / radius for each set of data and record this in the Data Table. 4. 12 marks 5. Use Excel to plot the graph of Fe/R (Y-axis) against 1/T2 (X-axis), add a linear best-fit line, and display the equation of the line. Staple a printout of the graph to the back of your report 6. Gradient of the graph (8 marks [2 marks m, where m is the mass of the ball, calculate the mass of the ball. 7. From the equation: gradient 4 [2 marks 8. The given value for the mass of the carriage is 25 g. compare this accepted value with your experimental value using the percentage error equation: perimental value - accepted value accepted value % error x 100 % 12 marks HCT PHYSICS LAB MANUAL 201810 Background: The equation linking the centripetal force, mass, radius and linear speed is: F. = can be calculated from measurements of the mass, radius and linear speed. Here you will graph your data to find mp2 So the centripetal force the mass. Apparatus: Centripetal force simulation. Procedures: 1. Open the link: https://www.thephysicsaviary.com/Physics/Programs/Labs/ClassicCircularForcelab/index.html and click 'begin' 2. Select the 'Lab' option. This simulation shows a ball moving in a horizontal circle at a constant speed on the end of a piece of string. The centripetal force is the weight of the washers hanging on the end of the string. 3. Repeatedly click on the yellow tape on the vertical part of the string to set the radius of the circle to 180 cm. 4. Repcatedly click on the washers on the end of the string to set the number of washers to 5. Each washer has a mass of 10 g. 5. Click start, and measure the time for 20 revolutions. 6. Record the time, and number of washers in the 1 two columns of the Data Table below 7. Repeat steps 4-6 for a total of six sets of data with a range of number of washers from 5 washers to at least 30 washers. HCT PHOSICS LAB MANUAL 201810

Answer 1

Accepted value is a value that scients s and bublic lake th as ue valus euperimenlal value is the value that getin we anyeuperiment There is some defference hatwean acapted valua and euperimental valut , which i's callod ΕyvoY. Eror uperimantal value- Accpled vale the percant (Suberi nonial valha -Accapted valee Snuserimn Genavally We ean se OrYoY Xl007 antal value