11th Grade Physics Assignment

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timer Asked: Jan 8th, 2019
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Question Description

The attached lab sheet requires completion. Course instructions: Follow the instructions on the lab sheet. Complete all parts of the lab and write your answers and results on the lab sheet. Lab Sheet and Rubric is attached.


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Name ___________________________ Class ________ Date ___________ TEKS Physics Lab Investigation 4B, 2F TEKS 4B Describe and analyze motion in one dimension using equations Descriptive with the concepts of distance, displacement, speed, average velocity, instantaneous velocity, and acceleration. TEKS 2F Demonstrate the use of course apparatus, equipment, techniques, and procedures, including multimeters (current, voltage, resistance), triple beam balances, batteries, clamps, dynamics demonstration equipment, collision apparatus, data acquisition probes, discharge tubes with power supply (H, He, Ne, Ar), hand-held visual spectroscopes, hot plates, slotted and hooked lab masses, bar magnets, horseshoe magnets, plane mirrors, convex lenses, pendulum support, power supply, ring clamps, ring stands, stopwatches, trajectory apparatus, tuning forks, carbon paper, graph paper, magnetic compasses, polarized film, prisms, protractors, resistors, friction blocks, mini lamps (bulbs) and sockets, electrostatics kits, 90-degree rod clamps, metric rulers, spring scales, knife blade switches, Celsius thermometers, meter sticks, scientific calculators, graphing technology, computers, cathode ray tubes with horseshoe magnets, ballistic carts or equivalent, resonance tubes, spools of nylon thread or string, containers of iron filings, rolls of white craft paper, copper wire, Periodic Table, electromagnetic spectrum charts, slinky springs, wave motion ropes, and laser pointers. Lab 2F, 4B: Measuring Distance and Displacement Introduction Vectors have many uses. For example, you can use vectors to describe the distance an object travels and the displacement that results from an object’s movement. Before you can make use of vectors, you must first select a frame of reference. To use vectors to describe an object’s position or movement on a flat surface, you must first define a frame of reference that includes the origin—a specific point that does not move. Two imaginary lines, or axes, that pass through the origin at right angles are then chosen, as shown in Figure 1 on the next page. These two lines are the x-axis and the y-axis. Using the axes, you can describe the position of an object in terms of its x- and y-coordinates—for example, the point (4, 8) on a graph. Note that the coordinates of the origin are (0, 0). Figure 1 shows that you can also define a vector to describe an object’s position by drawing an arrow from the origin to the object’s position. The object’s coordinates (7, 2) determine the length and direction of the vector. Figure 2 shows that any vector in the frame of reference can be broken down into x- and ycomponents. Therefore, any vector is also the resultant vector of its own x- and y-components. Resultant vectors are also used to represent the result of vector addition. 1 Name ___________________________ Class ________ Date ___________ TEKS Physics Lab Investigation 4B, 2F Descriptive Figure 1: Position vector Figure 2: Vector components You can use a similar method to define a vector describing an object’s displacement. To do this, draw a vector from the object’s starting point to its ending point. Figure 3 shows the x- and y-coordinates of an object’s starting and ending points. Note that the x- and y-components of the displacement vector are simply the difference between the x- and y- coordinates of the starting and ending points. Figure 3: Displacement vector 2 TEKS Name ___________________________ Class ________ Date ___________ Physics Lab Investigation 4B, 2F In this investigation, you will compare two methods of determining the length of a displacement vector. Descriptive Materials • • • • masking tape meter stick calculator string Safety • Put on safety goggles. Use caution to avoid bumping into people or objects when moving around the room. Note all safety alert symbols next to the steps in the Procedure, and review the meaning of each symbol. Pre-Lab Discussion Read the entire investigation first. Then work with a partner to answer the following questions. 1. How will you determine the x- and y-coordinates of each position? _______________________________________________________________________________ _______________________________________________________________________________ 2. How will you determine the x- and y-components of the displacement vector? _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 3. How will you calculate the length of the displacement vector? _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 3 TEKS Name ___________________________ Class ________ Date ___________ Physics Lab Investigation 4B, 2F 4. How will you measure the length of the displacement vector? _____________________________________________________________ Descriptive _______________________________________________________________________________ _______________________________________________________________________________ Procedure 1. Work with a classmate. Mark a dot on a small piece of masking tape. Mark the origin of your frame of reference by sticking a piece of masking tape on the floor, away from furniture and other obstacles. 2. Use the width of the classroom as the x-direction and the length of the classroom as the y-direction. Attach a 2-meter strip of tape to the floor, running from the origin in the x direction. This is the xaxis. Attach a second 2-meter strip of tape to the floor, running from the origin in the y direction. This is the y-axis. Note that the x- and y-axes should be at right angles to each other. 3. Select a point 1 to 4 meters from the origin as your starting point. Mark this point by sticking a piece of masking tape on the floor and marking a dot on it. Label this piece of tape Start. 4. Walk from the starting point to another point 1 to 4 meters from the origin. Mark this point by sticking a piece of masking tape on the floor and marking a dot on it. Label this piece of tape End. 5. Use a meter stick to measure the x-coordinate of the starting point to the nearest centimeter, as shown in Figure 4. Be careful to measure parallel to the x-axis. Record your measurement in the data table. Figure 4 6. Repeat Step 5, measuring parallel to the y-axis, to determine the y-coordinate of the starting point. Record your measurement in the data table. 7. Measure and record the x- and y-coordinates of the ending point in the same way that you determined the coordinates of the starting point. 4 TEKS Name ___________________________ Class ________ Date ___________ Physics Lab Investigation 4B, 2F 8. Determine the x-component of the displacement vector by subtracting the x-coordinate of the starting point from the x-coordinate of the ending point. Record this value in the data table as the vector component in the x-direction. 9. Repeat Step 8 with the y-coordinates of the starting and ending points to Descriptive calculate the y-component of the displacement vector. Record this value in the data table as the vector component in the y-direction. 10. Calculate and record the square of the vector component in the x-direction. Calculate and record the square of the vector component in the y-direction. 11. Use the following formula to calculate the length of the displacement vector L= x2 + y2 where L is the length of the displacement vector and x and y are the x- and y-components of the displacement vector. Record this value in the data table as the vector length of the displacement vector. 12. Working with your partner, stretch a string from the starting point to the ending point. While holding the string in this position, mark the string at both points. Use a meter stick to measure the distance between the two marks on the string. Record this measurement in the data table as the measured vector length of the displacement vector. Observations 5 TEKS Name ___________________________ Class ________ Date ___________ Physics Lab Investigation 4B, 2F Descriptive Analyze and Conclude 1. Measuring What tool can you use to measure the distance moved by an object? _____________________________________________________________ _______________________________________________________________________________ 2. Measuring How can you measure the distance an object has moved? _______________________________________________________________________________ _______________________________________________________________________________ 3. Measuring How can you measure the magnitude of the displacement of an object? _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 4. Calculating How can you calculate the displacement of an object? _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 6 Name ___________________________ Class ________ Date ___________ TEKS Physics Lab Investigation 4B, 2F _______________________________________________________________________________ Descriptive 7 TEKS Name ___________________________ Class ________ Date ___________ Physics Lab Investigation 4B, 2F 5. Controlling Variables How could using a large book as the displaced object produce a significant error in your results? _____________________________________________________________ Descriptive _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 6. Comparing and Contrasting How did the calculated length of the displacement vector compare with the measured length of the displacement vector? _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 7. Inferring Describe a condition in which it would be impossible to actually measure a displacement. _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 8 TEKS Name ___________________________ Class ________ Date ___________ Physics Lab Investigation 4B, 2F 8. Comparing and Contrasting How does the distance moved by an object between its starting point and ending point compare with the displacement vector between the same points? _____________________________________________________________ Descriptive _______________________________________________________________________________ Go Further In this investigation, you determined the distance between two points by measuring and calculating the displacement vector. How could you determine displacement by using a graph? Write a procedure you would follow to answer this question. Have your teacher approve your procedure before you carry out the investigation. How does the displacement determined by this graphing method compare with the actual measurement of the displacement? 9
Physics Hands-on Lab Rubric Top Scores (16–20) - The top scoring students will do the following: • Present ideas for a laboratory experiment that would accurately measure principles studied in this laboratory • Develop reasonable hypothesis regarding the variables measured in this laboratory • Accurately record data in well-organized and appropriately labeled data tables, as appropriate • Graph data in appropriate graphs using all the proper conventions and labeling procedures • Analyze data to show a deep understanding of physical principles • Draw conclusions based on experiments that show how physical concepts affect the world around them Middle Scores (10–15) - Acceptable scores for students go to those who do the following: • Present ideas for laboratory experiment that would measure principles studied in this laboratory, although the experiment may not actually work or measurements may be inaccurate • Develop hypothesis about variables measured in this laboratory, although hypothesis may be unreasonable • Record data in organized tables, as appropriate • Graph data in graphs, but may have some errors in labeling or organization • Analyze data with a basic understanding of physical principles • Draw conclusions based on experiments using direction from questions posed in lab Low Scores (0–9) - Students score poorly when they: • Do not present ideas for laboratory experiment that would measure principles studied in this lab or these ideas • Do not present hypothesis about values measured in this experiment • Record data in tables in a disorganized manner • Create graphs that do not correctly reflect the data and are difficult to interpret • Incorrectly relate experiments to physical concepts

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markjunior209
School: Boston College

Hello, yo...

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awesome work thanks

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