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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
From the choices below, Which of the following set of quantities affects the velocity of a free-falling object?
A. mass, time, gravitational acceleration
B. mass, time, elevation
C. weight, time, elevation
D. time, elevation, gravitational acceleration
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hellooo!! please help me plot the graph for these two trials and then find the slope
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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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Q4: please answer part a, previous parts are answered
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Analyzing Forces: Using Newton's 2nd Law
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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V 243%
+
Zoom Add Page
View
Я
Insert Table Chart
T
Text
4. You might have heard of Galileo's famous
experiment to demonstrate that all objects,
regardless of their weight and assuming no
air resistance, fall at the same acceleration
(Figure 5). Use Newton's Second Law of
Motion to show that for all objects,
regardless of their mass, the acceleration
due to gravity will be g, which we
approximate as 9.8 m/s².
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Character Styles
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od
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Format Document
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11 pt
^✡
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(The complete question is in the picture)
Which of the following situations illustrate Newton’s First Law of motion?A. An Isko moving with constantspeed relative to an acceleratingspaceship.B. An Iska rolling down the SunkenGarden.C. An Iska traversing a circular loopwith decreasing speed.D. An Isko at rest on an Ikot jeepneymoving with constant velocity
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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.
(Assume that friction is so small that it can be ignored.) When the same magnitude force is applied to another object, the
acceleration is 2.75m/s2. What is the mass of this object? What would the second object's acceleration be if a force twice as
large were applied to it? show your calculations.
Save & Go Next
99+
Bb
12:2
69°F
10/21
19
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Module 1: Newton's Laws of Motion
Activity 1
Conceptual Questions on Newton's First Law of Motion
Question
Answer
1. Why do moving objects eventually come to a
stop?
2. What is meant by net external force?
3. How does Newton's First Law of Motion relate
to seatbelts?
4. Why is it difficult or tiring when walking an a
very slippery floor?
5. An elephant chases Mark. The mass of the
elephant is too dangerous. But if Mark runs
around an oval, the mass of the eleptant will be
Mark's advantage. Why?
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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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Please answer the following question(s):
1. Assuming that the deer is not squished, the acceleration of the deer is:
a. less than the acceleration of the elephant.
b. greater than the acceleration of the elephant.
c. equal to the acceleration of the elephant.
d. independent of the masses of the deer and the elephant.
Answering the question(s) helps us recommend your next activity
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DYNAMICS OF RIGID BODIES problem. Round off your answers to the nearest 3 decimals.
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How to solve question 2b? Also are 1 and 2 correct? Please help
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Dynamics
1. If the resultant force acting on a particle is not zero, the particle will have an acceleration proportional to the magnitudeof the resultant and in the direction of this resultant force.2. Differentiating the velocity with respect to time will obtain ____________ of the particle.3. This is simply obtained from the average velocity by choosing shorter and shorter time intervals Δt and displacementsΔt.
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Directions: Complete the paragraphs below by providing the correct answers. Choose
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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show complete solution
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image!
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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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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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A cart can move along a horizontal line (the + position axis). It moves with the
velocity shown below.
Time (s)
Question 7A: Describe in words the acceleration-tim
graph of the cart's motion.
Question 7B: Assuming that friction is so small that it can be neglected, describe
in words the force-time graph to keep the cart moving with this velocity and
acceleration.
Question 7C: Explain both of your graphs.
Velocity
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Forces & Motion Q5. Please answer rest of the subparts and explain step by step and reasoning. Part b is answered correctly.
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Question 6: A force is applied that makes an object move with the acceleration
shown below. Assuming that friction is negligible, describe in words how a graph of
the force on the object as a function of time would look. Explain your answer.
Time(s)
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prediction 2-1: Suppose you grasp the screw eye, give the IOLab a short pull to the right (positive direction) and release it. describe in words the force vs time graph
prediction 2-2: describe the velocity and acceleration vs time graphs.
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2. What are the formulas used in solving free fall? Write them below and indicate what they are for.
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Newton's Second Law of Motion
Objective: The objective of this lab is to determine the relationship between force, mass, and acceleration on an object in motion.
Background: Objects acted upon by balanced forces (net force is zero) will either not move or not show a change in the amount of motion. Unbalanced forces (the net force on the object is not zero) can cause a change in motion. According to Newton’s Second Law of Motion, the magnitude of net force on an object is directly related to the acceleration of an object. The acceleration of an object is directly proportional to the net force of that object when the mass of the object is not changed. In other words, the larger the net force, the larger the acceleration on the object.
On the other hand, when we purposely keep the net force as a constant, the acceleration of the object will be inversely proportional to the mass of the object. That is to day, if the net force is a constant, the higher the mass of the object, the…
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figure B
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What is the acceleration of a car that from rest in 2 minutes acquires a velocity of 99 miles/hr?. Give the answer in miles/sec. *
If you walk at a constant speed for 5 minutes and cover a distance of 50 meters, what is your speed?. Express the answer in m/s. *
What is the gravitational acceleration the magnitude and direction of an object that is freely moving upwards? *
What is the acceleration of a box of mass 2kg that is pushed with a force of 10N? *
What is the gravitational force that the Earth exerts on you?. No numbers, explain. *
If an object is lying on a table and its weight is 3N, what is the normal force equal to? *
Does your desk exert any gravitational force on you? why?. *
How many radians represent one and a half revolutions?
An object of mass 5 kg moves at a…
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Unless otherwise noted, the free fall acceleration due to gravity on Earth is equal to -10m/s?
1
V = Vị + at
distance = Vt +
at2
1) A roller coaster's velocity at the top of a hill is 10 m/s. Four seconds later
it reaches the bottom of the hill with a velocity of 36.2 m/s. What is the
acceleration of the coaster?
2) A car traveling at 31.5 m/s starts to decelerate steadily. It comes to a stop
in 9 seconds. How far did the car travel during these 9 seconds? (Hint: you
need to know the acceleration)
3) A train is traveling at a certain speed. When the conductor applies the
brakes, it takes 1 minute and 25 seconds to stop. If the acceleration rate is
(-)0.8m/s?, what was the initial velocity of the train?
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PLEASE ANSWER 3,4,6 ONLY
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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
forces
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Let me know right away if you have issues while taking the test- do not wait until you are done with the te
This 2nd chance exam is optional. If you Begin this exam, it will count toward your grade.
Question 8
There must be a net force on an object in order for it to move in circular motion at a constant speed.
True
False
.Previous
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Forces & Motion Q3. Please answer and explain step by step and reasoning.
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