I. TITLE: Investigating Circular Motion
II. Objective: To find the mass of an object through the use of formulas and concepts known in relation to circular motion III. DATA:
* Radius (r): 29.00cm .29m + 0.05
* Cork: 12.55g 0.012kg + 0.001
Data Table 1:
| Trials| Time (s)+ 0.01| Average Time for 10 Rev. (s) + 0.01| Period (T)+ 0.001| Force (N)+ 0.005| .100kg| 1| 4.10s| 4.08s| .408 s| .981N|
| 2| 3.70s| | | |
| 3| 3.80s| | | |
| 4| 4.70s| | | |
.050kg| 1| 4.70s| 5.03s| .503 s| .491N|
| 2| 5.00s| | | |
| 3| 5.20s| | | |
| 4| 5.20s| | | |
.020kg| 1| 7.60s| 7.53s| .753 s| .196N|
| 2| 7.60s| | | |
| 3| 7.50s| | | |
| 4| 7.40s| | | |

Data Table Analysis:

IV. DATA ANALYSIS (Processing):
Graph 1:
Graph analysis:

Calculations:

.100kg + mass

.50kg + mass

.20kg + mass

V. ERROR ANALYSIS
.100kg + 0.01 mass
% error = (accepted - experimental)/accepted x 100
% error = 0.012 – .0143/ 0.012 x 100
% error = 14% error

.50kg + 0.01 mass
% error = (accepted - experimental)/accepted x 100
% error = 0.012 – .0109 / 0.012 x 100
% error = 9% error

.20kg + 0.01 mass
% error = (accepted - experimental)/accepted x 100
% error = 0.012 – .0097 / 0.012 x 100
% error = 22% error

SOURCES OF ERROR:
Random error: Human eye, vertical angle of the object in circular motion is not perfect, recording on the stopwatch. Systematic error: Non that I could detect

VII. CONCLUSIONS & EVALUATION:
Positive and Negative aspects (Benefits and Limitations)

As I was performing the experiments that were necessary to gather the data in order to complete this task, I realized that regardless of the high accuracy and precision of my recordings I had to change several steps in the procedure in order to make my results successful. The following were my limitations. * The person that was flinging the cork in a circular motion could never...

...Lab II, Problem 3:
Projectile Motion and Velocity
Oct. 06, 2013
Physics 1301W, Professor: Hanany, TA: Vladimir
Abstract
A ball is tossed obliquely. The vectors of position and velocity are measured.
The acceleration is calculated.
Introduction
A toy company is now making an instructional videotape on how to predict the position. Therefore, in order to make the prediction accurate, how the horizontal and vertical components of a ball’s position as it flies through the air should be understood. This experiment is to calculate functions to represent the horizontal and vertical positions of a ball. It does so by measuring and calculating the components of the position and velocity of the ball during the toss. Therefore, we can also calculate the acceleration during the procedure.
Prediction
The x-axis is located on the ground level horizontally, pointing to where the ball is initially thrown, that is opposite the direction the ball flies. The vertical y-axis passes through the highest point of the ball during the fly and point upward.
Since the ball experiences no other force, except for gravity, during the toss. There is no horizontal force. It is predicted that the ball should have a constant horizontal speed, which is the horizontal component of initial velocity. Vertically, it has gravity pulling it down all the time. So it should have an acceleration of –g (minus is for the direction). Since it has a...

... 9/16/14
Physics 01L
Density
Abstract
This experiment was conducted in order to determine the density of the Aluminum metal samples provided in the lab. Specific tools such as the vernier caliper and balance scale were used to measure and record the values found. Given that density is a measurement of mass over volume, both of these quantities would have to be determined experimentally, prior to proceeding with the calculation of the density, for each of the six subjects tested. Being as accurate and precise as possible, the data yielded a density that was similar to that of the accepted value for the density of aluminum. Taking averages of the measurements recorded by both partners may have introduced a variable for error. However, upon calculating the percent error of the results found, it was concluded that there was less than a three percent error, which supported the accuracy and credibility of the experiment.
Data
Table 1: Tabular Presentation
Aluminum
Diameter D1 (cm)
Diameter
D2 (cm)
Average
Diameter (cm)
Height
H1 (cm)
Height
H2 (cm)
Average Height (cm)
Mass (g)
Volume
(cm3)
1
1.27 cm
1.27 cm
1.27 cm
1.55 cm
1.548 cm
1.549 cm
5.6 g
V=1.96cm3
2
1.26 cm
1.266 cm
1.263 cm
2.64 cm
2.64 cm
2.64 cm
9.6 g
V=3.31 cm3
3
1.26 cm
1.266 cm
1.263 cm
4.726 cm
4.728 cm
4.727 cm
16.6 g
V=5.92 cm3
4
1.26 cm
1.268 cm
1.264 cm
6.218 cm
6.216 cm
6.217 cm
21.8 g
V=7.80 cm3
5...

...Experiment 1.7: Graphical Analysis of Motion
Introduction
To graphically analyze motion, two graphs are commonly used: Displacement vs. Time and Velocity vs. Time. These two graphs provide significant information about motion including distance/displacement, speed/velocity, and acceleration. The displacement and acceleration of a moving body can be obtained from its Velocity vs. Time graph by respectively finding the area and the slope of the graph.
Data Tables – Part I
Displacement (m) Time (s)
0.10 m 0.37 s
0.20 m 0.586 s
0.30 m 0.761 s
0.40 m 0.907 s
0.50 m 1.041 s
0.60 m 1.147 s
0.70 m 1.263 s
0.80 m 1.351 s
0.90 m 1.439 s
1.00 m 1.597 s
1.10 m 1.646 s
1.20 m 1.779 s
1.30 m 1.956 s
Part II
Main Photogate at __(m) Time (s) Instantaneous Velocity (m/s)
0.30 m 0.098 s 0.41 m/s
0.40 m 0.072 s 0.55 m/s
0.50 m 0.06 s 0.67 m/s
0.60 m 0.053 s 0.75 m/s
0.70 m 0.047 s 0.85 m/s
0.80 m 0.043 s 0.93 m/s
0.90 m 0.042 s 0.95 m/s
1.00 m 0.038 s 1.05 m/s
1.10 m 0.038 s 1.05 m/s
1.20 m 0.041 s 0.98 m/s
1.30 m 0.049 s 0.82 m/s
1.40 m 0.05 s 0.8 m/s
1.50 m 0.055 s 0.72 m/s
Part III
Estimated area
Velocity vs. Time graph
From t=0s to t=0.8s
0.49 m
Slope @ T= 0.8 s
Displacement vs. Time
= 0.6 m/s
Velocity vs. Time
= 0.3 m/s2
(Work shown on graph paper)
Summary Questions
1) Describe the meaning of the slopes of the graphs you obtained in Part...

...
PhysicsLab Report
How does the length of a string holding a pendulum affect its oscillation?
Method
1. You will need the following apparatus: a pendulum, a piece of string, a clamp, a clamp stand and a timer.
2. Measure out 20cm and attach the metal ball.
3. Establish an angle and let the ball swing for 10 oscillations, timing it and stopping at the 10th one.
4. Write down your results.
5. Repeat steps 2-4 another 2 times so that your results are reliable.
6. Then change the length of the string 4 times, so that you get 5 different sets of results and for each time, repeat it 3 times.
DCP
Raw Data
Data Processing
Calculations:
To find the average of the time, I added all 3 values and then divided by three. For example:
(0.89+0.83+0.89)/3 = 0.87
I calculated the absolute uncertainty by considering the furthest point from the mean. For example:
1.31 (mean) – 1.25 (furthest point from the mean) = 0.06
Therefore my absolute uncertainty is +/- 0.06
I calculated the percentage uncertainty by dividing the absolute uncertainty by the mean and multiplying it by 100, like this:
(0.03/1.70) x100 = 0.18%
Source of uncertainties:
The uncertainties in the measurement came primarily from the equipment. Since we used a ruler that was divided into parts of 0.1cm, the readings were normally rounded up or down. The length of string was constant in all 3 times that we...

...
Centro de investigación y desarrollo de educación bilingüe (CIDEB)
PhysicsLAB REPORT
Uniform Rectilinear Motion
Teacher: Patrick Morris
Alejandra Castillejos Longoria
Group: 205
ID: 1663878
Abstract
The purpose of this experiment, was to prove the concept of the uniform linear motion by using an air track. With this, we demonstrated the impulse and change in momentum, the conservation of energy and the linear motion. We basically learnt to calculate the distance/time, acceleration/time, and velocity/time and graph it. The air track is also used to study collisions, both elastic and inelastic. Since there is very little energy lost through friction it is easy to demonstrate how momentum is conserved before and after a collision. According to the result, the velocity of the object in the air track was constant, it means that it didn’t have acceleration because it has constant velocity.
Introduction
First of all; we should understand what is linear motion. Linear motion is motion along a straight line, and can therefore be described mathematically using only one spatial dimension. Uniform linear motion with constant velocity or zero acceleration. The Air Track can be used to obtain an accurate investigation of the laws of motion. A car or glider travels on a...

...trials were performed or if the class data were to be compared and averaged. Performing the experiments under a vacuum and frictionless setting would remove external variables that affect the data leading to more precise numbers. More accurate percent discrepancies illustrating laws of conservation can be achieved by adding more trials and including more sophisticated measuring tools. These techniques would lead to more accurate results to reduce any experimental errors and to better validate the concepts of energy and momentum conservation.
Conclusion
The purpose of the experiment was to investigate simple elastic and inelastic collisions to study the conservation of momentum and energy concepts. The objective of the lab was met since the validity of the Law of Conservation of Momentum was confirmed by determining the relationship of energy and momentum conservation between inelastic and elastic collisions by utilizing percent discrepancy calculations. The calculations state that the percent discrepancies for inelastic collisions were 8.75% and 19.23 % for the equal mass and unequal mass respectively. The percent discrepancies for the equal and unequal mass elastic collisions were 22.07% and 9.78 % respectively. Both of the percent discrepancies for the elastic collisions were close to the 10%-15% range which validates the concept of momentum conservation in inelastic elastic collisions. In regards to conservation of energy,...

...
E105: UNIFORM CIRCULARMOTION
NADONG, Renzo Norien D.
OBJECTIVE
The purpose of this experiment is to quantify the centripetal force on the body when one of the parameters is held constant and to verify the effects of the varying factors involved in circularmotion. Mainly, horizontal circular type of motion is considered in this activity.
Circularmotion is defined as the movement of an object along the circumference of the circle or the manner of rotating along a circular path. With uniform circularmotion it is assured that the object traversing a given path maintains a constant speed at all times. Centripetal force is a force that tends to deflect an object moving in a straight path and compels it to move in a circular path.
MATERIALS AND METHODS
This experiment was divided into three parts in order to further study and observe the factors that affect the centripetal force of a body. The concept of this experiment is the same on all parts, which is getting the centripetal force given with three different conditions. Every part of the experiment was executed just the same. Mass hanger plus a desired mass of weights were hanged over the clamp on pulley to determine a constant centripetal force which will act as the actual value. But on the third part of this experiment, aside from the centripetal...

...cause invalid comparison between data points to occur. 8 dominoes will be used for the entire experiment.
Mass of the metal weight (500 g) If the mass of the metal weight is different, this will affect the initial force acting upon the domino, and ultimately this will increase or decrease the rate of the falling domino, or it might not even budge the dominos at all. The same metal weight will be utilized for the entire experiment.
Angle between the base and the inclined ramp (20o) The angle of the ramp also impacts the placement of the metal weight that acts as the trigger to push the dominoes. If the angle of the ramp is not kept constant, the potential energy stored in the metal weight will be different, thus when it is set into motion, the force that will hit the domino will not be the same. This will then interfere the consistency of the data. The angle of 20o will be set by using a protractor.
Type of inclined plane Even though friction is neglected in this experiment, by using a different type of inclined plane, the acceleration of the metal weight will be slightly modified, thus the initial force exerted by the metal weight on the domino will also be altered. The same wooden plane will be utilized for the entire experiment.
Starting point of the metal weight If the starting point of the ball is inconsistent, the force applied on to the dominoes will also be inconsistent, thus altering the overall data. The place where the ball will be...