ap physics lab guide

8/13/2019 AP Physics Lab Guide

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AP PHYSICS LAB GUIDEJ. Patrick Polley

Department of Physics and AstronomyBeloit College, Wisconsin

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20%


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0 0

20 0

12

0

sin

20 1 sin2

sin


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sin

sin

90.5 0.1 cm

2.531 0.001 cm

sin

21 sin2

2

1sin2


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2 20 1 02

1 0

sin 0 1 21 2 sin

5%

210.05 0.05 sin2

1

2 110.05 sin2

1 2

0.025 sin 2 sin

20.00031 sin

sin


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sin 2


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drag ,

drag

drag

drag

1/

ln 1 ln ln ln

ln 1 ln

1 ln ln

1


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1


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1 1

2 2 1

1

2

2

1 1 2 2 1 1 2 2

2 2 2 21 1 2 2 1 1 2 2

1 1 1 12 2 2 2

2 2

1 1 1 1 2 2

2 2 21 1 1 1 2 2

1 1 12 2 2

1 2 1

1 2 1 1 2 1 2

21 1 2

1 2

1 2 1

22 22

1 1 1 1 2 2 21

1 1 12 2 2


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2 1 1 2 12

2

1 1 2 1 2 1

1

2

2 2 2

1 1 1 1 2 2

1 1 1

2 2 2

1 1 1 1 2 2 v v v

1 2

2 21 1 2

1 1 2 v v v

2 21 1 2 22( ) v v2 1 1 v 2 v


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1 2 1 2

1 1

2 2


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1 2

1 20

1 2 1 2 1 2

1 2 1 2 1 2

1 2 1 2

1 2

1 20

1 2

1 20

1 2 1 2, , , ,

1 2


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2

2

2

22 2


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2 2

2 5

3 5


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2cos

cos

2

2 2cos 4

2 2cos 4 cos

2 24


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22calc 4 0.150 kg 0.80 m 1.098 s

3.93 newtons

calc meas

meas calc meas


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4.1 s 3.9 s 4.1 s0.04 or 4%

length

length

0.002 m 0.800 m= 0.0025 or 0.25%

mass

mass

0.001 kg 0.150 kg0.0067 or 0.67%

1.142 s 1.074 s 20.034 s

time

time 2

2 0.034 s 1.098 s0.06 or 6%


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total

total mass length time

0.25% 0.67% 6%7%

1 22

total mass length time

6%

24


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F x

2 2

2 2

2 2 2

2

sin

1 22


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eff

eff spring 3

2spring 1 2


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spring

spring

2 2

springspring 3

1 2

2 3spring

spring 31 2 3

spring 2spring

1 2 3

spring 21 2 3

1 1log log log log 22 2

1 2


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1 2 1

2 1

2


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1 1

2 1

2

1

1

1


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1

2

2

1


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2 2

1 4


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1 0

1

1

1 1 2


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,

2 2 2

/12

,


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exp


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0

0

0

0

0 1

0 e

0 -t RC

e


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14

1

1

1

1


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1


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1 20.693 2


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3 22 2 20 2

3 22 2 20 2


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0 3

0 2

3 22 2

2

0 2

0

3 22 2

1 2%


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5%

0.1

10%

3

8


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1 2 3


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2


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1

180

2

90

1

2

1 2


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AP PHYSICS LAB GUIDE LAB TEN

Copyright 2003 by College Entrance Examination Board. All rights reserved.Available at apcentral.collegeboard.com

51

The analysis of the data is simple. If the sensitivity of the gaussmeter is 50mV/T, then the

fields in the three directions are given by

( ) ( )1 2 50 mV T x x x B V V = (10-5a)

( ) ( )

1 250 mV T

y y y B V V = (10-5b)

( ) ( )1 2 50 mV T z z z B V V = (10-5c)

The magnitude of the Earths magnetic field Earth B is then given by

( )1 22 2 2Earth x y z B B B B= + + The dip angle of the field is given by

( )1 21 2 2tan z x y B B B = +


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1

2

1 2sin sin

2

sin


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sin cos cos sin

cos

cos sin cos cos sin

sin cos tan

tan tan cos

2

2 1 sin sin


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2 2

2

2 1

2

2 2

2

2

22

2 is 1.32 0.06


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sin

sin


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tan


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20.2

20.7

61.83 10

61.79 10 61.81 10

60.02 10


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20.6 21.1

61.79 10 meters 20.6

61.83 10 meters 21.1


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1 2

1 2

1 1-k 14


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1


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2 1-M

1

2

2

10%


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stop

stop


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1 4

1 4


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ap physics lab guide

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