EXPERIMENT 2: LINEAR MOTION OBJECTIVES
To determine displacement, velocity and acceleration of a linear motion. To analyse analyse linear motion of a moving object.
DIAGRAMS/DRAWAINGS
1. Ticker cker time timerr 50H 50Hzz
2. Carb Carbon onize ized d tick ticker er tape tape
. !"n#ay
$. %o#er s"pply
5. Trolley
&. '"mper #ire
(. !"ler
). *ab jack+clamp
. Cellop-ane tape
10. rap- paper and gl"e
PROCEDURES
1. T-e trolley #as rolled do#n freely from rest #it-o"t any applied force. 2. T-e ticker tape #as attac-ed to t-e trolley by "sing cellop-ane tape. . T-e ticker timer is s#itc-ed on and t-e trolley #as released freely
Figure 2a
$. /very 10t- dot is marked and n"mbered. 5. /very 10t- dot ticker tape #as c"t and pasted . ote 1. re3"ency of ticker4time is 50Hz. T-erefore, 1 dot or 1 "nit time represent 1+50 second or 0.02 second. 2. Time for 10 dots 10 dots 6 0.02 second 0
Figure 2
7!89
Figure 2! DATA
1 2
"mber of 104 dot strips Total time, t total n"mber of strips 6 0.2
10 6 0.2 2 s
Total displacement of t-e trolley
10
2.$15
÷ 100
2.$15 m
8verage velocity of t-e trolley $
v
total displacement total time
8cceleration of t-e trolley a. :nitial velocity u
lengthof first strip time for 10 dots
b. inal velocity
v
5
lengthof last strip time for 10 dots
c. Time for acceleration, t 7n"mber of strips ; 19 6 7time for dots9
v
1.20(5 m+s 6.35 ÷ 100 0.2
0.1(5 m+s 36 ÷ 100 0.2
1.) m+s 710419 6 70.29 1.) s 1.8
a
&
2
1.8 −0.3175
d. 8cceleration
8verage velocity
2.4195
v −u t
1.&2$ m+ s
2
1.8 + 0.3175 0.2
average =
v +u 2
1.5)(5 m+s
ANAL"SIS
ERROR ANAL"SIS
/rror
Careless #-en doing t-e calc"lation. 8pplied force #-en release t-e trolley.
=e caref"l #-en doing t-e calc"lation. >ake s"re t-ere is no applied force #-en release t-e trolley.
E#UIPMENT ERROR
?"ring t-e e6periments t-ere #ere diffic"lties t-at sometimes occ"rred #it- t-e ticker tape timer$ T-o"g- t-e mac-ine #orked 3"ite effectively t-e problem #as enco"ntered #it- t-e p"rple carbon disc t-at created imprints on t-e ticker tape paper. ?"ring t-e e6periment one to occasions t-e disc #o"ld eit-er not imprint anyt-ing on to t-e ticker tape paper or come off d"ring t-at e6periment. T-is res"lted in trails -aving to be repeated and t-e #aste of lab materials to retrieve acc"rate data.
IN%ERENT ERROR
T-ere@s al#ays potential for in-erent errors d"ring on e6periment and t-is one is not an e6ception. T-e cart being released and t-e operation of t-e ticker tape timer #ere done by t#o different gro"p members. T-is created t-e possibility for t-e cart to be released slig-tly before or after t-e ticker tape timer #as activated. T-o"g- it may not seem drastic beca"se t-e time meas"rements being recorded are so minisc"le s"c- a sync-ronization problem can significantly c-ange in average velocities per interval.
IMPROVEMENTS
T-ere are major improvements t-at can be proposed to make t-e data collected from t-is e6periment more precise and acc"rate. T-e first improvement #o"ld be t-e creation of a tool to allo# one person to operate bot- t-e ticker tape timer and release of t-e trolley. =y creating a release b"tton t-at #o"ld operate bot- devices it #o"ld sync-ronize t-em and ens"re t-e data #as precise. 8lso placing groove on t-e board #-ic- t-e trolley co"ld r"n along on t-e ramp #o"ld allo# t-e trolley to -ave a constant start and end track on t-e board. T-is #o"ld eliminate t-e variation of places t-e trolley co"ld start and finis- from and t-e c-ance of t-e trolley falling of t-e board near t-e end of its r"n.
#UESTIONS &$ :s t-ere any difference in t-e val"e of average velocity bet#een res"lt $ and &A /6plain yo"r ans#er.
Bes, t-e different bet#een res"lt $ and & is res"lt $ is 1.20(5 m+s and res"lt & is 1.5)(5 m+s. T-at beca"se res"lt $ is a t-eory #-ile res"lt & is practical. !es"lt $ is t-eory beca"se it s-o#s t-e velocity of t-e e6periment. -ile res"lt & s-o#s t-e average velocity. 2.
b. :ncreasing
c. ?ecreasing
. rom yo"r res"lt, state t-e motion of t-e trolley. 8ns#er 8cceleration
CONCLUSION
rom t-e e6periment, #e fo"nd t-at e6periment linear motion #as s"ccessf"l done according to t-e proced"res. T-e objective of e6periment #as ac-ieved to analyse linear motion of a moving object and determine displacement, velocity and acceleration of a linear motion. 8s t-e concl"sion, t-e -ypot-esis is accept. e enable to determine linear motion of a moving object and enable to determine displacement, velocity and acceleration of linear motion.
