Problem: How do you use a recording timer to nd the acceleration due to gravity '? Materials Graph paper Recording timer Masking tape Recording tape Ruler 3200 g mass Procedure: a. Draw a table to record time, displacement and average velocity. b. Attach the recording tape to the mass . c. Thread it through the timer as instructed d. Start the timer and drop the mass onto you book bag, so that the recording tape is pulled through the timer. e. Repeat bc until each person in your group has atape of the motion . f. Analyze the tape by marking the starting dot t=O and dividing the tape into equal time intervals The period of the timer is 1360 s, so each six -interval frame would b 0.105 g. Measure and record in your table the displacements (such as ddl: drifndl) corresponding to each timer interval . h. Calculate and record the average velocity for each time interval . i. Plot a graph of 1velocity vs. time for the dropped mass by plotting the average velocities at half-time intervals {such as 0.05 s, 0.15 s). j. Draw.r the straigt line of best fit from the origin through the points . 1;. Calculate the average acceleration of the dropped mass in m.-"s2 by finding the slope of the velocity time graph . 1. Find the displacement of the mass by finding the area under the triangle beneath the velocity tin1e graph . Be sure to include the units. Compare this to the displacement of the mass by measuring the length of the recording tape for the same part of the trip