Materials: Golf ball, measuring tape, masking tape, Phyphox app. Procedure: 1. Tape the measuring tape on the wall. 1. Scientist #1 (the dropper), stands next to the measuring tape on a chair, reaches as high as they can and drops the golf ball. 2. Scientist #2 (the timer) monitors PhyPhox Acoustic timer (to see that it starts as the golf ball hits the floor the first time and stops when the ball hits the floor the second time) and records the time in the table. 3. Scientist #3 (the measurer) video records the drop and marks the highest spot on the wall that the ball reaches on the first bounce and measures it in meters. Record it in the table. 4. Repeat steps 1-3 three times 6- Change the drop height by 10 cm and repeat steps 1-4. You need at least 6 different drop heights. Time elapsed between first and second impact Start Timer Stop Timer Height of Time ti Time to Time to Average Average Average drop first bounce (S) (s) (s) time, t drop time, time, squared (m) ($) t/2 (s) ($2) * 120 m 0. 7875 10.50/s 1. 0 00 9 995 3 2 |2 1. 00 1 1 1 2 10 7 m 18. OFbtu 10. 9665 . m 0- 7285 2 " D. 483 s 0. 982 85 , 2 2 0. 923 3 2 103 51 0. 9395 0 . 4695 D . 96 9 5 - 0.9695 2 10.95 m 10. 8935 D. 4475 0. 4465 s 0 . 9 4 4 9 8 6 7 7 5 = = 0. 945 52 D. 92 5m 0 8605 3 0. 43 5 0 . 9 2 7 3 6 1 8 4 9 5 2 = 0 . 92 75 2 10 .86 m 0. 82 75 0.414 , 4 0. 4135 , 0 .909 3 9 5 5 " 20. 909 5 2 Analysis: 0. 3945 0. 3935 5 0. 887 , 2 2 0.8875 2 1)plot a displacement vs time graph (use average drop time)- Use this graph to describe the motion of golf ball. 2) plot a displacement vs drop time? graph (average drop time squared) and calculate its slope. 3) How can you use the slope to calculate acceleration of the golf ball? [Hint: one of the big 3!] 4) Calculate percent error. * 0 . 364 5 0. 85 2 29 16 5 2 ~ 0.852 5Physics 11 Lab 2.2: Follow the Bouncing Ball Names rpose: i) To study the motion of a freely falling body and determine the value of "g" -acceleration due to gravity- on Earth. Materials: Golf ball, measuring tape, masking tape, Phyphox app. Procedure: 1. Tape the measuring tape on the wall. 1. Scientist #1 (the dropper), stands next to the measuring tape on a chair, reaches as high as they can and drops the golf ball. 2. Scientist #2 (the timer) monitors PhyPhox Acoustic timer (to see that it starts as the golf ball hits the floor the first time and stops when the ball hits the floor the second time) and records the time in the table. 3. Scientist #3 (the measurer) video records the drop and marks the highest spot on the wall that the ball reaches on the first bounce and measures it in meters. Record it in the table. 4. Repeat steps 1-3 three times 6- Change the drop height by 10 cm and repeat steps 1-4. You need at least 6 different drop heights. Time elapsed between first and second impact Height of Time to Time tz Time to Average Average Average drop first bounce (S) (s) (S) time, t drop time, time, squared (m) ($) t/2 (s) ($2 ) 3120 m Loo25 78m| |0.78 75 1.000 9995 5 = 1:0014, 2 107 m 2 6 7m 0-7285 2D 4835 0. 982 85, " 2 0. 923 3- In3 5in 10. 9395 0 4695 D . 969 5 - 0.9695 2 #95 in 0. 893s D.447 , 1 0.4465s 10 . 9 4 4 9 1 6 75 2 0. 945 5 - 92. 5 m 0 8605 3 0.435 0. 927361 845 - 0. 9275 86 m|0 8275 0.4 4 , 4 0. 4135 0.909 3 9 5 6' Analysis: D. 39 4 5 6 0. 3935 5 0. 887 , 2 1) plot a displacement vs time graph (use average drop time)- Use this graph to describe the motion of golf ball. 2) plot a displacement vs drop time? graph (average drop time squared) and calculate its slope. 3) How can you use the slope to calculate acceleration of the golf ball? [Hint: one of the big 3!] 4) Calculate percent error. 80. 3645 0. 85 2 29 16 s " - 0.8525