Abstract:
With using the new software this lab was different than the rest. We determined many solutions using video analysis. We used a frictionless track with a “car” and recorded using loggerpro software. We used this software to determine average velocity and instantaneous velocity. With this information we than discovered the average acceleration, mine was .2115. After that we were able to find δa, then finally the free-fall acceleration, I got 1.693. Overall this was a fun and difficult experiment, but I learned a ton about acceleration and velocity. Introduction:

The average person might hear the word physics and have no idea what it really means. The formal definition is; a science that deals with matter and energy and their interactions. Now that definition is nice and short, and doesn’t explain into too much detail, but that is the gist of it. And hopefully can help you understand this lab a little bit more. The next question an average person is going to ask is when is this even used in real life? But there are many examples, for one; 2-d vectors and projectile are used when using a cannonball, or any other ball flying through the air, every motion on a flat surface. Another example is hitting a golf ball, which can be in kinematics or in dynamics. If only motion of a golf ball is discussed, with terms like velocity, acceleration, displacement etc. then it's in kinematics. If mass, force, and impulse are also mentioned, than its dynamics. Those are just two of many different examples. The example that ties into this lab is hitting the golf ball, well the part about acceleration and velocity. So, if this lab is completed correctly and not only will you be able to determine the acceleration and velocity of the car on the tract but of your golf ball as well, which could be fun to see who’s is the highest with your friends. So before you know it you will be using physics in your everyday life and...

...Investigation between mass and acceleration
Stage 1 - Planning
Title: Investigating acceleration – How does changing the mass of an object change its acceleration?
Introduction: As the speed of moving object and rate, the forces acting on the object, the mass of the object, and gravitational force of it might affect the acceleration, I will investigate about the mass of the object.
Aim: I will try to answer the question “How does changing the mass of an object change its acceleration?” which is to find the relationship between the mass of an object and the acceleration rate.
Hypothesis: I think that a trolley with a large mass will accelerate slower than a trolley with a small mass.
Apparatus: Ramp, blocks, trolley, string, masses (50g, 100g, 1kg), pulley, stop clock, sticky tape, laptop, data logger, two light gates
(Labeled diagram indicated below)
(Photo by: “Yenka simulations – Road Science”, http://mathsci.werribeesc.vic.edu.au/science10/Yenka/10_trolley_acceleration.html)
Method for collection of data:
Independent variable --- Mass of trolley, steepness of the ramp
Dependent variable --- Acceleration, time taken
Constant variable --- Temperature, slope, starting point, ending point, etc.
1. Fasten the pulley to one end of the ramp, and place it near the end of the bench
2. Put some blocks under the other end of the ramp.
3. Push the trolley...

...
Objective: the purpose of this lab is to investigate the law of conservation of energy. This can be achieved by measuring both potential and kinetic energy through the experiment conducted.
Back ground:
Kinetic energy is said to be the energy of motion. Kinetic energy can be defined through this equation:
KE=12mv2 (equation 1)
Where m is the mass of the object in motion, and v is the velocity of the moving object.
Potential energy is the energy associated with the forces that depend on the position of the object. However, there are specific types of potential energy and in this lab we will consider gravitational potential energy. Gravitational potential energy is the energy possessed by the objected due to earth's gravity. This can be specifically defined by the equation:
PEgrav=mgy (equation 2)
Where m is the mass of the object, g is the acceleration due to gravity and y is the height of the object.
With these energies defined, total energy of the system is the sum of its kinetic energy and potential energy at any point in time.
Total energy= kinetic energy+ potential energy=constant
Therefore the law of conservation of energy is defined as: the total energy is neither increased nor decreased in any process. Energy can be transformed from one to another, and transferred from one object to another, but the total amount remained constant, therefore conserve.
Procedure:
the...

...1.
Two ships P and Q are moving along straight lines with constant velocities. Initially P is at a point O and the position vector of Q relative to O is (6i + 12j) km, where i and j are unit vectors directed due east and due north respectively. The ship P is moving with velocity 10j km h–1 and Q is moving with velocity (−8i + 6j) km h−1. At time t hours the position vectors of P and Q relative to O are p km and q km respectively. (a) (b) (c) Find p and q in terms of t.
(3)
Calculate the distance of Q from P when t = 3.
(3)
Calculate the value of t when Q is due north of P.
(2) (Total 8 marks)
2.
A train starts from rest at a station A and moves along a straight horizontal track. For the first 10 s, the train moves with constant acceleration 1.2 m s–2. For the next 24 s it moves with constant acceleration 0.75 m s–2. It then moves with constant speed for T seconds. Finally it slows down with constant deceleration 3 m s–2 until it comes to rest at a station B. (a) (b) (c) Show that, 34 s after leaving A, the speed of the train is 30 m s–1.
(3)
Sketch a speed-time graph to illustrate the motion of the train as it moves from A to B.
(3)
Find the distance moved by the train during the first 34 s of its journey from A.
(4)
The distance from A to B is 3 km. (d) Find the value of T.
(4) (Total 14 marks)
3.
Two cars A and B are moving in the same direction along a straight...

...block
October 4, 2012
Balloon Powered Car
Problem: In order to create a race car that can travel a minimum of eight meters powered by a nine inch balloon. We need incorporate Newton's Law of Motion including speed, velocity, and acceleration.
Hypothesis: If a car were to be made out of homemade materials, then it would be possible for it to travel 8 meters powered by a nine inch balloon.
Independent Variable: building the car from homemade materials.
Dependent Variable: The results of speed and distance from the car responding to the materials
Rationale: In this experiment, the challenge is to build a balloon powered car from homemade materials that can travel at least 8 meters. According to Newton’s Third law, it is possible to accomplish this objective. Force is any push or pulls and can be measured in newtons. The first law states that an object at rest will remain at rest unless acted upon by an opposing force. It also says that if an object is in motion will stay in motion unless acted upon by an unbalanced force. Also, during research it was found that Newton's 2nd law states that an object's acceleration depends on the mass of the object and the force acted upon it. This law is expressed in the equation, F (force) = M (mass)*A (acceleration). The third law explains that when an object exerts force on another object that object exerts force back. The objects would equal each other in magnitude...

...Table of Contents
Abstract……………………………………………………………………………………………2
Introduction………………………………………………………………………………………..2
Background………………………………………………………………………………..2
Objectives…………………………………………………………………………………2
Scope………………………………………………………………………………………3
Theory review……………………………………………………………………………………..3
Design of report…………………………………………………………………………………...5
Procedures…………………………………………………………………………………………5
Results……………………………………………………………………………………………..6
Discussion…………………………………………………………………………………………6
Conclusion………………………………………………………………………………………...7
Reference……………………………………………………………………………………….....7
Appendix…………………………………………………………………………………………..7
ABSTRACT
This experiment introduces the use of dimensionless analysis and conventionally analytical method to survey the performance of centrifugal pump. The end of this experiment points out the benefit of using the “new” method to the conventional in most practical problem, especially in the survey of turbo-machine. Also, through this experiment, students know some basic indexes to assess the efficiency of pumps used. We will that for the specific fan conducting this experiment, the best efficiency point occurs at CQ = 0.2, the specific speed NS ~1.23.
INTRODUCTION
Background
A fan is a turbo-machine in which work is done to increase the total pressure of the fluid leaving the device. This is achieved by a rotor or impeller, which is driven by an external source of power to move a row of...

...Daphny Maldonado
Bio Lab 2107
Kiah Britton
W 10-12:30
Is H20 Bad for You?
Abstract:
In the village of Gopher Hollow there’s a cluster of Blue Baby Syndrome. There were
four infants affected by this cluster. The families from the infants would collect their
water from wells. We have to determine what’s the source of the high levels of nitrites in
the water. The four sources that could be the point of contamination are a new
subdivision, textile plant, an organic farm, and a mountain lake. We had to ﬁnd the
concentration of each known standard and unknown standard. We did this by using a
spectrophotometer. The results were the following, the organic farm with a herd of 50
cows and a 10 acre ﬁeld of zucchini had the highest levels of nitrites.
Introduction:
Blue Baby Syndrome is a condition that affects many infants. This condition makes
the baby’s skin turn blue because of the lack of oxygen. This condition can exhibit
lethargy, vomiting and not being able to breathe. It can even lead to death in rare cases.
This condition is caused by the excess amount of nitrate that is then converted into
nitrite by the digestive system. The hemoglobin then reacts with the nitrites to form
Methemoglobin. Methemoglobin is not a problem in adults since they have an enzyme
that converts methemoglobin back to hemoglobin. Infants don’t have many of the
enzyme to convert methemoglobin to hemoglobin, resulting in Blue Baby Syndrome. For
example in Gopher...

...
Background Information
Terminal velocity is when a falling object reaches a constant velocity due to a balance in the forces of weight and air resistance. In this experiment, we dropped marbles of difference weights in 100 ml of oil to calculate their terminal velocity.
Research Question
How does the mass of an object effect its terminal velocity?
Aim
Our aim is to measure the terminal velocity, of marbles of different masses, in oil.
hypothesis
Objects of larger mass will take longer to reach the bottom of the cylinder, whereas objects of lesser mass will take less time to reach the bottom of the cylinder.
Variables
Independent Variable: Volume of oil
Dependent variable: Time taken
Controlled variable: Weight of marbles
Apparatus & Materials
1. Measuring cylinder
2. Oil
3. Weighing machine
4. Marbles of different sizes
5. Timer
6. Paper
7. Pen
8. Calculator
method & procedure
1. Get apparatus ready on a clear table.
2. Get
Data
Calculations
Time taken*length of cylinder = terminal velocity
Small marble
1st trial – 0.002*18
=0.036
2nd trial – 0.015*18
=0.27
3rd trial – 0.016*18
=0.288
4th trial – 0.035*18
=0.063
Average: 0.657/4
= 0.16425
Medium marble
1st trial – 0.015*18
=0.27
2nd trial – 0.056*18
=1.008
3rd trial – 0.028*18
=0.36
4th trial – 0.02*18...

...understand and verify the relationship centripetal force, mass, velocity, and the radius of orbit for a body that is undergoing centripetal acceleration.
Background Information
An object moving in the same direction is not necessarily undergoing acceleration. If the object changes speed while moving in the same direction there is acceleration (or deceleration). On the other hand, if the object moves at a constant speed in the same direction, there is no acceleration. This does not mean that constant speed always indicates no acceleration, however. An object that moves at a constant speed and changes direction is also experiencing acceleration even though its speed never changes. Both the acceleration produced by changing speed and the acceleration produced by changing direction require a net force. This force that is produced in called the centripetal force and the acceleration that causes a change in direction is called centripetal acceleration.
Centripetal force means “center seeking.” It is the force responsible for keeping an object in circular motion. If there were no centripetal force the object would fly off at a tangent because of Newton’s First Law. This is demonstrated by spinning an object on a string. If the string were to break or be cut, the object would fly out of its circular path at a...