Bio Mech Lab Report #2 PDF

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Lab assigned by teacher and answers found in the lecture videos provided...

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Jasmine Rodden APK 3220L – Biomechanical Basis of Movements Labatory February 19th, 2021 Lab 2 - Linear Kinematics

TABLE 1. Position-time data for Usain Bolt’s 100 m sprint at the 2008 Beijing Olympic Games. Position (m)

Time (s)

Displacement (s)

Velocity (m/s)

Acceleration (m/s2)

0

0

0

0

0

10

1.85

10

5.41

2.92

20

2.87

10

9.80

4.30

30

3.78

10

10.99

1.32

40

4.65

10

11.49

0.57

50

5.50

10

11.76

0.32

60

6.32

10

13.70

0.54

70

7.14

10

12.20

0

80

7.96

10

12.20

0

90

8.79

10

12.05

-0.18

100

9.69

10

11.11

-1.04

TABLE 2. Position-time data for Usain Bolt’s 100 m sprint at the 2009 IAAF World Championships in Berlin. Position (m)

Time (s)

Displacement (s)

Velocity (m/s)

Acceleration (m/s2)

0

0

0

0

0

10

1.90

10

5.26

2.77

20

2.88

10

10.20

5.04

30

3.80

10

10.87

0.73

40

4.63

10

12.05

1.42

50

5.46

10

12.05

0

60

6.29

10

12.05

0

70

7.11

10

8.85

2.83

80

7.92

10

12.35

4.32

90

8.75

10

12.05

0.36

100

9.58

10

12.05

0

TABLE 3. Position-time data for Usain Bolt’s 100 m sprint at the 2012 London Olympic Games. Position (m)

Time (s)

Displacement (s)

Velocity (m/s)

Acceleration (m/s2)

0

0

0

0

0

10

1.91

10

5.24

2.74

20

2.92

10

9.90

4.61

30

3.84

10

10.87

1.05

40

4.70

10

11.63

0.88

50

5.54

10

11.90

0.32

60

6.36

10

12.20

0.37

70

7.17

10

12.35

0.19

80

7.98

10

12.35

0

90

8.80

10

12.20

0.18

100

9.63

10

12.05

0.18

POSITION-TIME GRAPH

Position-Time 100 90 80

Position (m)

70 60 50 40 30 20 10 0 0

1

2

3

4

5

6

7

8

9

10

Time (s)

Usain Bolt is moving in the positive direction in 10-meter increments. Due to the fact that Usain Bolt is moving in the positive direction, the velocity will always be positive.

VELOCITY-TIME GRAPH

Velocity-Time 14

12

Velocity (m/s)

10

8

6

4

2

0 0

1

2

3

4

5

6

7

8

9

10

Time (s)

To begin, Usain Bolt starts moving in the positive direction. Because of the velocity increasing, it directly correlates with acceleration and acceleration will also be positive. However, at 6 ½ seconds the velocity begins to decrease, so in this case the acceleration will be negative. At the next 10-meter increment, Usain bolt begins to speed back up and the acceleration moves in the positive direction again. At the last 10-meter mark the velocity stays the same, meaning acceleration is now at 0.

ACCELERATION-TIME GRAPH

Acceleration-Time 6

5

Acceleration (m/s2)

4

3

2

1

0 0

1

2

3

4

5

6

7

8

9

10

Time (s)

Usain bolt started this race with first 20 meters at a positive acceleration, meaning that velocity is increasing which means that Usain Bolt was speeding up. At the 20 to 30-meter mark Usain Bolts acceleration declines which shows that velocity decreases meaning he was slowing down. Now at the 50 to 60-meter mark Usain Bolt is now moving in the negative direction so because it shows that decline in the negative direction it means that velocity increases. At the 70-meter increment acceleration is back to increasing and so velocity is decreasing and then when acceleration decreases again the velocity then increases again....