Lab 3 answer sheet
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Laboratory Exercise 3: Projectile Motion and Error Propagation Answer Sheet
Name: _______Anya Sawchuk_____
Name: ________________________
Name: ________________________ Name: ________________________
This is the form that you must turn in to get credit for the lab. Please answer the questions fully
as some questions ask you to write an explanation instead of a number or multiple choice answer. If the lab asks you to make graphs, do so in Excel copy them into this sheet in the appropriate place.
When you are ready to turn the lab in, convert the file to .pdf and submit it via the Assignments
tool on D2L. Labs submitted in other formats will not be considered. A group of up to 4 members may submit one lab report. It is not necessary for each member to submit a separate report as long as each member’s name in included at the top of this sheet.
Part A:
Exercise 3-1
1.
What is accelerating the ball?
Gravity is accelerating the ball.
2.
a
x
=
¿
m
s
2
a
y
=
¿
−
9.8
¿
s
2
3.
If the height of the table was doubled, would you expect the distance that the ball travels off the end of the table (shown as ∆ X
) to decrease, stay the same, increase but not double, double, or more than double? Highlight or bold your answer.
If the height of the table doubled, the time it would have originally taken to reach the ground will increase. The distance is able to increase but not double.
Exercise 3-2
Data Table 1
Length of Ramp = _____4
_____ m
____0.05
___m
Measure the height of the ramp (height) and estimate the uncertainty in the measurement. See Lab 1 if you need a reminder on estimating uncertainty.
Height of ramp = _____9____
m
_0.005
_m
Measure the height of the table (
∆Y
) and estimate the uncertainty in the measurement. See Lab 1 if you need a reminder on estimating uncertainty.
∆Y
= ___76_____
m
_0.005
_m
Measure the horizontal distance that the marble traveled (
∆ X
) from the edge of the table to the marks on the paper.
Trial 1
Trial 2
Trial 3
Trial 4
Trial 5
∆ X
(m)
3.9
3.9
3.8
3.9
3.9
1.
Average distance the ball traveled (
∆ X
¿
= ____3.88_______
m
2.
Time of flight of the ball = _______0.46
________s
3.
Initial velocity of the ball = ________8.44_______
m
s
4.
Standard deviation of the horizontal distance = _____0.010
________ m
5.
Standard error in the distance = ________0.004______
m
6.
Uncertainty in the distance = _______0.008_________
m
7.
Proportional error in the distance = ______0.214_______
8.
Proportional error in the height of the table = _____0.669
__________
9.
Proportional error in the velocity = _______0.66_______
10. Uncertainty in the initial velocity = ____0.711
_____ m
s
. Exercise 3-3
1.
Angle of the ramp = _______________
°
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1.
An m-mass body slides a distance of d along a horizontal surface. The work done by the force
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