Name: Jneofine pal Date: 1027/211Instr: HV.Kong Physics Laboratory Experiment - Straight Line Motion At Constant Speed Purpose: In this experiment, the position of a bulldozer moving in a straight line is measured at various times, to determine the bulldozer's speed. Procedure: 1. Allow a toy bulldozer ton travel across a table top or the floor for a distance of 3 or 4 meter in a test run. 2. Place a tape measure or a series of meter sticks along the path of travel. Start the bulldozer starting line, start keeping track of the time with a stop watch or sweep second hand. 3. Five seconds after the bulldozer crosses the starting line, record its position. Without stopping the first column of the data chart. 4. Reduce the speed of the bulldozers by forcing it to drag a load behind as it travels. Following the procedure above, record the position of the bulldozer at the end of each 5 second interval in the second column of the data chart. 5. Add heavier weights behind the bulldozer to reduce its speed further and record position and time in the remaining columns of the data chart. few centimeters before the starting line. When the bulldozer reaches the the bulldozer, repeat this procedure at 5-second intervals. Enter all of the data in Data Chart: Position of bulldozer in cm. (x) Trials Experiment #2 Trials Experiment #1 Time in seconds (t) 1 2. 3. average 3 average Ocm Ocmlocm 0cmo Cm oom 87cm a1 cm 95cm 91 cm 10 Cm 68 cm79 Cm12 Cm 10 160em65 cm176 cm161 Cm 135 cm138 Cm1470m140 Cm 15 2420m 2470 254 cm 248 Om 191 em/20 cm 204 cu20I Cm. 20 329cm 325 C325 cm 326 Cm 25tom 253cm266om 251 Cm 25 404cm/3960403cm 40l cm 316 c310 Cm3230316 Cm 30 38703720m3820 380 cm Average speed (Vav) in cm /sec 186 204 Cm/S 225c224c0238 227 Cnls 244 181 Data and Analysis: 1. For each trial, calculate the average speed, Vav, by dividing the total change in position by the total time interval that elapsed, t. 2. Use the data for the first trial to plot a graph of position vs time. 3. On the same piece of graph paper, plot a graph of position vs time for each of the other trials you ran. label each graph with the number of the associated trial. 4. The shape of a position vs time graph for motion at constant speed is a straight line. Do your graphs have this shape? - 10-