UGA PHYSICS 1111 LAB
CERTIFICATION EVALUATION
EXAM QUESTIONS WITH ANSWERS
GRADED A PLUS
◉ LAB 1: error & accuracy & %error & diff. Answer: -Error: diff
between value of physical quantity determined by experiment and true
value
-Types of error may occur during an experiment: experimentalist not
take the time to be as accurate & detailed
-Accuracy: percentage diff or absolute diff
-Percentage Error = (Estimated- Actual)/ (Actual) x 100
Percent difference= | E1- E2 | / 1/2(E1 + E2) x 100
◉ LAB 1- precision. Answer: -related to way u carried out
measurements & how u reported ur results
-precision of a number indicated by # of sig figs used
◉ LAB 1: Sig Figs. Answer: leftmost nonzero # = most sig
rightmost nonzero # = least sig
,◉ LAB 1: The result of a multiplication or division should have how
many significant figures? Answer: As many as the factor with the least
amount of figures
◉ LAB 1:
When excess digits are dropped from a number, the last digit retained
should be. Answer: ROUNDED
◉ LAB 1: GRAPH PART:. Answer: -(the measured/dependent variable
on y-axis and (set or independent variable on x axis
-prediction is correct=results should be straight line w slope C
equation for straight line: y =(slope)x + (intercept)
◉ LAB 1: graph continued. Answer: -best line of fit: line that agrees w/
trend of the plotted data points while minimizing error
-slope is evaluated: drawing right triangleABC & THEN DETERMINE
LENGTH OF THE SIDES AB AND BC-slope is ratio of bc to ab
◉ LAB 1: apparatus. Answer: apparatus: studies straight line motion
◉ LAB 1: The Air Track. Answer: -no friction & air track level=air track
not move
, -not leveled=gilder will move back n forth and it could be adjusted by
the bolt on the bottom
-ours wasn't so we adjusted bolt and made it lower so the glider would
remain in place
◉ LAB 1: air track. Answer: when track is lvl, push glider and watch
motion
-overtime glider does slow down & eventually stops. (friction reduced
but NEVER ZERO)
◉ LAB 1: air track continued
sources of friction slowing glider down. Answer: -air resistance
-friction from hitting bumpers
◉ lab 1: air track continued
what can you to cause the glider to accelerate even after you let go
(ignore friction). Answer: adding more air once the glider is in motion
and tilting air track
◉ lab 1: air track continued
CERTIFICATION EVALUATION
EXAM QUESTIONS WITH ANSWERS
GRADED A PLUS
◉ LAB 1: error & accuracy & %error & diff. Answer: -Error: diff
between value of physical quantity determined by experiment and true
value
-Types of error may occur during an experiment: experimentalist not
take the time to be as accurate & detailed
-Accuracy: percentage diff or absolute diff
-Percentage Error = (Estimated- Actual)/ (Actual) x 100
Percent difference= | E1- E2 | / 1/2(E1 + E2) x 100
◉ LAB 1- precision. Answer: -related to way u carried out
measurements & how u reported ur results
-precision of a number indicated by # of sig figs used
◉ LAB 1: Sig Figs. Answer: leftmost nonzero # = most sig
rightmost nonzero # = least sig
,◉ LAB 1: The result of a multiplication or division should have how
many significant figures? Answer: As many as the factor with the least
amount of figures
◉ LAB 1:
When excess digits are dropped from a number, the last digit retained
should be. Answer: ROUNDED
◉ LAB 1: GRAPH PART:. Answer: -(the measured/dependent variable
on y-axis and (set or independent variable on x axis
-prediction is correct=results should be straight line w slope C
equation for straight line: y =(slope)x + (intercept)
◉ LAB 1: graph continued. Answer: -best line of fit: line that agrees w/
trend of the plotted data points while minimizing error
-slope is evaluated: drawing right triangleABC & THEN DETERMINE
LENGTH OF THE SIDES AB AND BC-slope is ratio of bc to ab
◉ LAB 1: apparatus. Answer: apparatus: studies straight line motion
◉ LAB 1: The Air Track. Answer: -no friction & air track level=air track
not move
, -not leveled=gilder will move back n forth and it could be adjusted by
the bolt on the bottom
-ours wasn't so we adjusted bolt and made it lower so the glider would
remain in place
◉ LAB 1: air track. Answer: when track is lvl, push glider and watch
motion
-overtime glider does slow down & eventually stops. (friction reduced
but NEVER ZERO)
◉ LAB 1: air track continued
sources of friction slowing glider down. Answer: -air resistance
-friction from hitting bumpers
◉ lab 1: air track continued
what can you to cause the glider to accelerate even after you let go
(ignore friction). Answer: adding more air once the glider is in motion
and tilting air track
◉ lab 1: air track continued
