Reaction Time Lab

Problems
How do distractions affect reaction time?
Hypotheses
Procedure: AGIC

Data:
Your 6 measurements (w/ and w/o cell phone)
Your averages
Class averages

Calculations of reaction time from distance

Conclusion….

Math
The meter stick drops at 9.8 m/sec/sec

Acceleration = (Vf-Vi)/t
Vi=0
Vf/2=Vavg
D=Vavg*t

Algebra
d= ½ (at2)
Or since we know a and can measure d

t= (sqrt(2d/a))

Enter d as meters (100 cm=1 m) and a as 9.8 m/sec/sec

And  the answer comes out in seconds.

Compare reaction times
(how far will a car travelling at 40 mph travel in those times)

	AP _ Reaction Time Lab
	Distance the meter stick dropped
Average distance dropped in cm	17.16		32.10		31.96
	Focused		Cell Phone Distraction		Conversation Distraction
	5		23		36
	14		19		26
	8		32		28
	9		30		22
	17		27		11
	6		26		15
	13		30		15
	9		28		20
	7		20		32
	10		19		36
	8		28		22
	8		17		23
	10		26		25
	18		40		27
	20		25		18
	18		20		10
	20		23		20
	6		25		20
	4		5
	13		14
	11		22
	15		47
	7		28
	8		17
	14		74
	18		34
	22		45
	16		34
	26		63
	15		26
	10		23		24
	6		18		90
	20		15		75
	14		32		30
	20		21		29
	10		36		18
	10		35		34
	18		29		23
	16		19		17
	12		10		11
	16		21		24
	8		15		23
	31		15		80
	15		27		12
	3		19		53
	13		28		50
	9		10		23
	14		12		22
					27
	5		27		12
	10		23		18
	9		40		21
	18		32		19
	7		23		13
	16		22		8
					10
	33		38		36
	20		48		27
	17		43		53
	37		23		36
	26		27		25
	8		33		30
	50		65		50
	27		35		31
	38		60		16
	19		37		19
	16		55		9
	23		39		21
	58		32		20
	30		33		25
	28		35		42
	16		39		43
	22		50		15
	20		37		53
	28		23		23
	28		23		36
	26		30		39
	19		22		40
	20		22		38
	23		30		32
	23		26		30
	21		27		46
	16		32		56
	10		30		58
	15		45		80
	40		26		40
	18		32		18
	14		80		18
	14		43		12
	13		39		22
	13		13		24
	13		22		24
	23		80		50
	25		50		60
	50		35		38
	14		40		28
	14		40		51
	23		33		31
	7		12		39
	8		30		80
	14		43		23
	13		24		80
	8		20		21
	9		46		22
	13		36		80
	10		25		40
	12		40		30
	13		23		27
	16		20		19
	20		30		80
	13		32		18
	13		25		24
	9		23		45
	10		24		30
	15		27		31
	16		25		45
	14		29		23
	16		23		42
	11		80		38
	19		40		19
	31		80		23
	20		23		31
	8		21		8
	16		9		7
	8		13		10
	5		29		13
	11		6		8
	7		15		14
	17		25		21
	13		26		24
	21		42		9
	12		41		16
	12		47		27
	12		35		20
	47		77		38
	23		30		59
	28		22		80
	42		39		80
	28		23		80
	25		38		67
	13		15		49
	7		36		30
	10		13		37
	4		76		35
	7		12		20
	6		18		28
	57		30		35
	16		43		76
	29		32		31
	20		20		31
	20		28		31
	25		36		22
	13		24		16
	20		46		24
	12		27		9
	3		69		30
	7		23		6
	23		16		3
	27		34		36
	25		17		34
	14		20		59
	20		30		36
	38		32		32
	37		70		70
	17		80		28
	16		49		30
	9		26		30
	20		80		21
	15		51		38
	12		30		14