Lab Report 2
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Date
Apr 3, 2024
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Lab 2: Freefall and Acceleration Due to Gravity
Objective: This lab was to demonstrate that acceleration due to gravity is equal to 9.8 m/s
2
in
both freefall and projectile motion using bean bags.
Hypothesis: I think that in both experiments, the acceleration will be equal to or
around 9.8 m/s
2
since gravity dragging the bean bag down will be the same
regardless of whether the bean bag is in freefall or has projectile motion.
Methods:
Experiment 1
In experiment one, we dropped a bean bag from a height of 2 meters, which was measured
using meter sticks, and used timers to clock how long it took the bean bag to fall to the
ground across 10 different trials. Using the data collected, we calculated the acceleration of
each of the 10 trials.
Experiment 2
In experiment 2, we launched a bean bag with slight projectile motion from a height of 2
meters, which was measured using meter sticks, and used timers to clock how long it took
the bean bag to fall to the ground across 10 different trials. Using the data collected, we
calculated the acceleration of each of the 10 trials.
Raw Data:
Table #1:
Bean Bag in Freefall
Trial
Height (m)
Time (s)
Acceleration (m/s
2
)
1
-2 m
.68
-8.65
2
-2 m
.66
-9.18
3
-2 m
.67
-8.91
4
-2 m
.63
-10.07
5
-2 m
.58
-11.89
6
-2 m
.65
-9.46
7
-2 m
.65
-9.46
8
-2 m
.63
-10.07
9
-2 m
.62
-10.40
10
-2 m
.67
-8.91
2
Δy/t
2
= a
Table #2:
Projectile Motion of Bean Bag
Trial
Height (m)
Time (s)
Acceleration (m/s
2
)
1
-2 m
.86
-5.40
2
-2 m
.77
-6.74
3
-2 m
.93
-4.62
4
-2 m
.61
-6.55
5
-2 m
.65
-9.46
6
-2 m
.63
-10.07
7
-2 m
.63
-10.07
8
-2 m
.68
-8.65
9
-2 m
.58
-11.89
10
-2 m
.70
-8.16
2
Δy/t
2
= a
Data Analysis:
What kinematic equation will you use to find the acceleration?
Δy= V
i
t+1/2at
What will the initial velocity of the object be if it is dropped from some height?
The initial velocity of an object in freefall is 0 since it has yet to move. Once gravity
begins having an effect, the object will fall and gain velocity.
In projectile motion is there an acceleration in the x direction, y direction, or both directions?
In projectile motion, there is acceleration in both the x and y directions. The object
being thrown or pushed moves in the x direction away from where it is being thrown
or pushed, and in the y direction as the object falls.
What equation will you use to determine the acceleration?
2
Δy/t
2
= a
If the object is launched horizontally, does it have an initial velocity in the y direction?
No, the initial velocity of an object launched horizontally is in the x direction. The y
direction does not gain velocity until the object begins to fall.
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Related Questions
For the exercises in Chapter 3, use the approximate value of g = 10 m/s2 for the acceleration due to gravity.
E1. A steel ball is dropped from a diving platform (with an initial velocity of zero). Using the approximate value of g = 10 m/s^2, a. What is the velocity of the ball 0.6 seconds after its release? b. What is its velocity 1.2 seconds after its release?
E2. For the ball in exercise E1, a. Through what distance does the ball fall in the first 0.6 seconds of its flight? (Assume g = 10 m/s^2.)b. How far does it fall in the first 1.2 seconds of its flight?
only need question 2 the rest is for reference
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Which of these is an example of high precision?
a. An archer hits the bulls-eyeb. A student correctly calculates the acceleration due to gravity to be 9.8ms2c. An archer hits the same spot on the target three times in a rowd. A student tries to throw a pencil into the garbage can and makes it ine. A student correctly calculates the mass of an object to be 54kg
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OC equal to the magnitude of the weight of the elevator.
O D. None of the above
QUESTION 10
m/s2 ?
An object moves with a constant speed of 428 m/s on a circular track of radius 21 m. What is the magnitude of the acceleration of the object: a=
(Note: For fill in blank, I have set the unit for the answer. So, you just need to provide a number - Please write your numerical answer with all digits and do not use
scientific notation. If you are not sure about the number of significant figures, you can keep the number of figures as many as possible - You will not be punished for doing
this. )
QUESTION 11
Consider two vectors and shown in the figure below.
B
A
Save and Submit to save and submit. Click Save All Answers to save all answers.
pe here to search
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Part 2: Tension - Experiment
You will now test these predictions using Sparkvue to measure the acceleration of the
smart cart). Place 20 gm on your mass hanger.
DO NOT LET THE MASS HANGER BANG ONTO THE FLOOR!
DO NOT LET THE CART HIT THE PULLEY!
Record the acceleration from each run below.
Run Acceleration (m/s²) Run
420
402
+433
Acceleration (m/s?)
445
4
2
3
.415
From this data calculate the average and statistical uncertainty for the acceleration.
Acceleration =
m/s2
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A fireman has a mass of 75 kg. When the bell in the firehouse starts ringing, he slides
down the pole with an acceleration of 3 m/s². What is the total force of friction acting on
his body?
1. Identify the problem: What quantity are you being asked to find?
What units will this answer be in?
2. Visualize and then sketch the problem.
Draw arrows to illustrate the direction
of the two forces acting on the fireman.
Label these two forces by name.
Do not use numbers yet.
3. These two forces act in opposite (+/-)
directions and they will partially cancel.
Assign the + value to the stronger force.
The sum of these two forces is called the
Net Force and it is the force which will actually
move the fireman.
Fill in the names of these two forces in the
equation template below. (Hint: Remember that mass and weight are not the same.)
Do not use numerical values yet:
Net Force = +
4. Newton's 2nd Law gives us another equation for calculating Net Force:
Net…
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Question # 2 can you show me how to solve
Just a study guide so it's not graded
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C. one-half of the product of gravitational acceleration and time squared
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LAB 5: MORE ABOUT NEWTON'S LAWS
Question 11: When a force is applied to an object with mass equal to 1.00 kg, the acceleration of the mass is 3.25m/s2.
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Save & Go Next
99+
Bb
12:2
69°F
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Refer to the picture below:
a. What is the speed of the object when it is still held at the starting point?
b. What happens to the speed of the object as it falls?
c. What is the change in velocity per unit time or the acceleration of the object?
d. What is the total distance of the object from the ground when it is at the starting point? (t=0 s)
e. What happens to the object’s distance from the ground as it falls?
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Scientific Narrative 14
Using your HW Guide as a resource, write a scientific narrative paragraph for the following prompt:
How can a ball bouncing up and down be used to describe acceleration?
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from the answers found inside the textbox. Concepts may be used more than once.
Projectile
motion
Vertical motion
Projectile
Uniform motion
independent
Free fall
Gravity
Trajectory
9.8 m/s²
Constant speed
is an object that is thrown, shot or launched upon which the
is the motion of a
). It follows a curved path which is
A (1).
only force acting is (2).
projectile. Its path is called is (4).
parabolic.
A projectile has two components-the vertical motion and horizontal motion. The
horizontal component is (5).
(3).
The vertical component is
(6).
horizontally at (7).
(8).
other. Therefore, the horizontal and vertical motion can be treated separately.
A projectile launched horizontally will be considered to be a free fall because there is a
change only in its
This means that if air resistance is neglected, a projectile moves
and it falls vertically with acceleration of
These two components are completely (9).…
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Time (s)
Question 7A: Describe in words the acceleration-tim
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Question 7B: Assuming that friction is so small that it can be neglected, describe
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acceleration.
Question 7C: Explain both of your graphs.
Velocity
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Your answer
What is the value of acceleration due to gravity in cm/s^
convert) *
Your answer
Consider two balls that are the same size, but different n
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Your answers are saved automatically.
Remaining Time: 2 hours, 25 minutes, 30 seconds.
v Question Completion Status:
Moving to another question will save this response.
Question 6
A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move,
the scale briefly reads only 0.73 of the person's regular weight. Calculate the acceleration of the elevator.
A Moving to another question will save this response.
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Time(s)
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What is the acceleration of a box of mass 2kg that is pushed with a force of 10N? *
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Does your desk exert any gravitational force on you? why?. *
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I) Which sphere will hit the ground first
a) lead sphere
b) aluminum sphere
c) they land at the same time
d) not enough information to solve
Lets say both of these spheres were made of copper but had different speeds, one fast and one slow. (These spheres are also identical)
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Newton's First Law of Motion CER
Using Newton's First Law of Motion, explain
why you should always wear a seatbelt when
riding in a vehicle.
B
CLAIM: What is your answer to the
question above?
EVIDENCE: Compare what happens
to a person with a seatbelt during a
crash versus what happens to a
person who is not wearing a seatbelt.
Use the pictures above.
REASONING: Use Newton's First
Law to explain the two situations
given in the evidence section. Use
the words Newton's Law of Motion.
force, balanced and unbalanced
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PLEASE ANSWER NUMBER 3 at the YouTube timestamp 5:27
https://www.youtube.com/watch?v=tMKXbLBgkEc
Timestamps with questions
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(4:19) 2. How did some of the pieces of watermelon bounce much higher than other pieces?
(5:27) 3. Assuming the guys are average height, about how high is the trampoline off the ground? a. 2.5 mb. 4 mc. 1.5 md. 1.8 m
(6:41) 4. The tower is 45 m high. About how high did the ball rebound?
(11:45) 5. How high did the car bounce? Was it about the same as the ball?
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TU444d5c9fa55721#10001
Learning Goal:
To learn to use images of an object in motion to
determine position, velocity, and acceleration.
The motion of the rocket labeled A is an example of motion with uniform (i.e., constant)
O and nonzero acceleration
Two toy rockets are traveling in the same direction (taken
to be the x axis). A diagram is shown of a time-exposure
image where a stroboscope has illuminated the rockets at
the uniform time intervals indicated. (Figure 1).
O velocity
O position
O time
Submit
Request Answer
Part E
The motion of the rocket labeled B is an example of motion with uniform (i.e., constant)
O and nonzero acceleration
O velocity
O position
Figure
1 of 1
View Available Hint(s)
O before t =1 only
O after t =
4 only
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FREE FALL
A train is operating at an average speed of 115.5 km/h for 3 hours, then at an average speed of 108.0 km/h for the next 2 hours, and lastly it had an average speed of 112.5 km/h on its last 1 hour trip. What was the average speed for the 6 hour trip?
NEWTON’S LAW OF MOTION
A wagon accelerates 15.0 m/s2 when a force of 650.0 newtons is applied to it. What is the mass of the object?
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For your calculations you will get a table with the measured time and velocity data, as well as the graph velocity vs time.
The procedure consists in the following steps
a) Prepare software and hold the picket fence above the photogate as shown in Figure 1. (Be sure that the picket fence has a soft, foam pad to land on.) f
Figure 1. Picket fence and photogate
nllln
b) Click “record” on the display, then release the picket fence.
c) After the picket fence lands, click “stop”. Picket fence must not hit the gate
d) Use the velocity vs time in Table 1 to calculate the acceleration of the picket fence due to gravity using the following equation
where
a(t0) is the…
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