Physics 100 – Uniform Motion Page 1 of 6
SAN DIEGO MESA COLLEGE Name_________________________
PHYSICS 100 LAB REPORT Date __________Time___________
Partners ______________________
TITLE: Uniform Motion ______________________________
______________________________
______________________________
Objective: To determine the equation of motion for a toy tractor.
Theory: The motion of an object is described by the change of it's position with respect to time,
as measured from a start point for it's position and it's time ( i.e. at x=0 and t=0). The
mathematical relationship for an object's position as a function of the time it reaches
that position is called the object's equation of motion. The simplest equation of motion
is for motion without acceleration. This motion is called uniform motion.
Equipment: motorized cart tape timer mount
tape-timers 1 1/2 meter strips
meter-stick brick
masking tape
Setup:
Paper strip 1.5 meters long
Masking tape
Brick
C(caarbrboonn p saidpe ru dpi s)k
Tapper
M o ctaortiz ed
Physics 100 – Uniform Motion Page 2 of 6
Technique: The tape timer has a circular piece of carbon paper and a tapping mechanism. The
tapper taps on the carbon paper specific number of times per second. As the toy tractor
moves, the tape timer puts marks on the paper strip at regular time intervals. The
amount of time between marks (the Δt) is decided by which direction the switch on the
timer is moved when it is turned on. There are two settings 10Hz and 40Hz. We will be
using the 10Hz setting for a Δt = 0.1seconds. The tractor will move a certain distance
Δx between each mark. These two sets of values will give us the data we need to get
the equation of motion.
Procedure: Turn the tractor on temporarily to see which direction it will move.
Face it so it will move away from the tape timer.
Get one of the long paper strips.
Feed one end through the first plastic slot, then in between the silver metal plate and the
circular piece of carbon paper, and out through the other plastic slot. If it's not feeding
easily, slightly bend a small portion of the end of the paper strip. This might help.
Take a small piece of masking tape and tape the end of the paper strip nearest to the
timer to the top of the tractor.
Place the tractor near the tape timer, but leave enough room to lift the tractor off the
table a little bit (you'll lift it later).
Pull the rest of the tape out the back of the tape timer so that it is hanging over the edge
of the table.
Have one partner lift the tractor off the table enough so that they can turn the tractor on.
Have another partner on the opposite end of the table ready to stop the tractor.
Have a third partner move the switch on the tape timer to the 10Hz position. The timer
should start clicking.
Have the person with the tractor turn it on, aim it towards the brick and set it on the
table.
Once the tractor gets to the other side of the table, move the timer's switch to the off
position to turn it off.
Remove the paper strip from the tractor and turn it over. Make sure the marks made by
the timer are dark and visible.
If they are easily visible, then you are ready to start the analysis. If not, try rotating the
circular piece of carbon paper and run through the procedure again. If this still doesn't
produce visible marks, ask the instructor for help.
Analysis: Look at the marks (dots) on your strip.
The beginning of your strip is the side that was attached to the tractor. The first few
marks probably won't look evenly spaced.
Choose and circle the first dot, after skipping several, which appears sharp and is
evenly spaced with its neighbors. This is dot #1 which occurs at t = 0 sec. and has a
starting position of x = 0 cm.
Lay the paper strip along a meter stick or ruler and use masking tape to attach the first
dot you choose for t = 0 and x= 0 to the zero end of your meter stick or ruler.
Physics 100 – Uniform Motion Page 3 of 6
Record the position of where each dot is along the ruler or meter stick.
Calculate the distance interval between each dot and the dot before it. The distance
interval is the position of each dot minus the position of the dot before it. The distance
interval is also known as Δx.
Dot # Position
(cm)
Time
(Ticks)
Distance
Interval
(cm)
Ave.Velocity
In interval
1 0.0 0 (cm/sec)
2 1
3 2
4 3
5 4
6 5
7 6
8 7
9 8
10 9
The average velocity that the object obtains during an interval of one tick is the distance
interval traveled during that one tick divided by the time elapsed (one tick). To
calculate the average velocity, divide the distance interval by one tick.
This gives you units of cm / tick.
To convert this to a usable number, you will need to multiply this number by the
Number of ticks per 1 second.
There are 10 ticks per second.
This will give you units of cm / sec.
Fill in your table with each of the average velocities.
Physics 100 – Uniform Motion Page 4 of 6
Because the motion is uniform, the average velocity over all the intervals can be found
by adding up all the average velocities, and dividing by the total number of average
velocities intervals.
Record this value below the average velocity column on the data sheet.
Analysis: The equation of motion is found by plotting the distance (in cm, on the y-axis) as a
function of time (in ticks, on the x-axis).
Plot this on the linear graph paper provided in your lab packet.
Calculate the slope of your graph, showing all work including units, in the space
provided below.
(Dfinal - Dinitial) / (Tfinal - Tinitial) = slope
Where D is distance in cm and T is the time in ticks
Convert this slope to cm / second using the same conversion as you did for the average
velocity.
SLOPE FROM GRAPH: CONVERSION:
Calculate the percent difference, in the space provided below, between the average
velocity from the data sheet and the slope of the graph, using the formula:
% difference = (difference between two experimental values / the larger of two values)
x 100
What name is given to the constant (the slope of the graph) which relates the distance
traveled by the tractor and the time it took to get to that distance?
Physics 100 – Uniform Motion Page 5 of 6
Write the equation of the graph, in the form y = mx + b. in the space below. Where y is
the variable plotted on the vertical axis and x is the variable plotted on the
horizontal axis, m is the slope of the graph, and b is the vertical intercept. The vertical
intercept, b, will be close enough to zero to be neglected.
Don't forget to include units in your equation.
Use this equation to calculate, showing all work including units in the space provided
below, how far the tractor would travel in 45 seconds.
How many meters is this? Show your work in converting the units.
How many yards is this? Show your work in converting the units.
Analysis:
Use this equation of motion to predict how many MINUTES it would take the tractor to
Travel 11.78m which is the length of the lab room.
Show all your work below including unit conversions.
Physics 100 – Uniform Motion Page 6 of 6
Summary of Results:(What is the equation of motion for the tractor, in words)?

The mass of a particular eagle is twice that of a hunted pigeon. Suppose the pigeon is flying north at ??,2=18.1vi,2=18.1 m/s when the eagle swoops down, grabs the pigeon and flies off. At the instant right before the attack, the eagle is flying toward the pigeon at an angle ?=40.3θ=40.3° below the horizontal and a speed of ??,1=37.9vi,1=37.9 m/s.

What is the speed of the eagle immediately after it catches its prey?

What is the magnitude of the angle, measured from horizontal, at which the eagle is flying immediately after the strike?

This time Ron is at his wits end. He has sent the accounting team out of his office to rework the numbers. "That simply cannot make sense. If I'm making more than I'm spending, it's a good decision; right?" He walks into your office for your weekly meeting and asks rhetorically "If I'm spending $2,000,000 today on a new plant and that new plant is going to produce $205,000 for each of the next ten years in income how can that possibly be a negative net decision for the company?"

Can you explain to Ron the concept involved and how that could be a "negative net decision"?

Provide constructive feedback to at least two other students' postings.

suppose an economic boom is driven by very high levels of consumer confidence. compare and contrast the Keynesian and Monetarist approach in preventing the economy from overheating

A heat engine takes 0.350 mol of a diatomic ideal gas around the cycle shown in the pV-diagram of the figure (Figure 1) . Process 1?2 is at constant volume, process 2?3 is adiabatic, and process 3?1 is at a constant pressure of 1.00 atm. The value of ? for this gas is 1.40.

Part B

Find the volume at points 1, 2, and 3.

Enter your answers numerically separated by commas.

Part C

Calculate Q, W , and ?U for the process 1?2.

Enter your answers numerically separated by commas.

Part D

Calculate Q, W , and ?U for the process 2?3.

Enter your answers numerically separated by commas.

Part E

Calculate Q, W , and ?U for the process 3?1.

Enter your answers numerically separated by commas.

Question 1)
Describe in detail 3 examples of "front stage behavior" according to Goffman.

Question 2)
Describe in detail 3 examples of "back stage behavior" according to Goffman.

A cube with mass M slides down a frictionless curved incline as shown in the
figure below. It has a completely inelastic collision with another cube m at the bottom that is

Consider the following class TestScores. All the methods have direct access to the scores array. Please type in the answers here.

1. Write the constructor method. It fills the array with random number from 0 -100. Find below the code to get you started.

   public TestScores ()

  {

    Random rand = new Random();

    for(int i = 0; i < SIZE ; i++)

        {

           scores[i] = rand.nextInt(101);

        }

  }

2. Finding the maximum value in an array. Write the method findMax. It returns the maximum value in the array.

3. Finding the minimum value in an array. Write the method findMin. It returns the minimum value in the array.

4. Write the method countScores. The method returns the number of exams where the score is greater or equal to 90. This is an example of a linear search.

5. Write the method called findScore that accepts one int value. The method should check if the value exists in the array and if it does it returns true. Otherwise, the method should return false.

Discuss the basic differences between a competitive and a monopoly market. Which market has higher elastic demand in the long run and why?

1) Write the balanced neutralization reaction between H2SO4 and KOH in an aqueous solution.

0.350L of 0.430 M H2SO4 is mixed with 0.300 L of 0.270 M KOH what concentration of sulfuric acid remans after neutralization?

2) Balance the following: AgNO3 (aq) + NaCL (aq) ----->

                                         K3PO4 (aq) + MgCL2 (aq) ----->

3) Complete and balance the precipiation reaction: CuCl2 (aq) + Na2CO3(aq) ---->

Two manufacturing processes are being compared to try to reduce the number of defective products made. During 8 shifts for each process, the following results were observed:

Based on a 5% significance level, did line B have a larger average than line A?

*Do not use the p-value method

*Use the five step method

Step 1: H₀ :

H_A:

Step 2: alpha =

Step 3: Test Statistic:

Step 4: Decision Rule:

Step 5: Calculation and Decision

Reject or do not reject H₀? Why?

Based on a 5% significance level, did line B have better performance than line A in terms of process variation?

*Do not use the p-value method

*Use and show the five step method, as shown above

Reject or do not reject the H₀? Why?

A diver springs upward from a board that is 3.02 meters above the water. At the instant she contacts the water her speed is 9.15 m/s and her body makes an angle of 77.2° with respect to the horizontal surface of the water. Determine her initial velocity.

1) Explain Adam Smith statement that : "nothing is more useful than water: but it will purchase scarcely anything; scarcely anything can be had in exchange for it." Use the Diamond-Water paradox as an example.? Do you think Adam Smith statement still holds true today? Which drivers make water a scarce resource today? Do you think management of water will be a challenging issue in Saudi Arabia within the next few decades?

Can I have this answer in a screenshot of the python software?

In the game of Lucky Sevens, the player rolls a pair of dice. If the dots add up to 7, the player wins $4; otherwise, the player loses $1. Suppose that, to entice the gullible, a casino tells players that there are many ways to win: (1, 6), (2, 5), and soon. A little mathematical analysis reveals that there are not enough ways to win to make the game worthwhile; however, because many people's eyes glaze over at the first mention of mathematics “wins $4”.

      Your challenge is to write a program that demonstrates the futility of playing the game. Your Python program should take as input the amount of money that the player wants to put into the pot, and play the game until the pot is empty.

            The program should have at least TWO functions (Input validation and Sum of the dots of user’s two dice). Like the program 1, your code should be user-friendly and able to handle all possible user input. The game should be able to allow a user to ply as many times as she/he wants.

            The program should print a table as following:

      Number of rolls            Win or Loss                 Current value of the pot

                  1                                 Put                                    $10

                  2                                 Win                                  $14

                  3                                 Loss                                  $11

                  4

                  ##                              Loss                                  $0

        You lost your money after ## rolls of play.

        The maximum amount of money in the pot during the playing is $##.

        Do you want to play again?

      At that point the player’s pot is empty (the Current value of the pot is zero), the program should display the number of rolls it took to break the player, as well as maximum amount of money in the pot during the playing.

        Again, add good comments to your program.

        Test your program with $5, $10 and $20.

We can install Ad-blocking software to enable our web browsers let us visit different
websites while not viewing pop-up advertisements available on those websites. Give
reasons in favor or against the following proposition.
"Different companies provide you with free access to those websites because they use the advertisements as a mean of revenues. Hence you as a user violate an implicit
social contract by installing Ad-blocking software on your browser."

*please give me you opinion not from the internet.