Pre-Lab Quiz: Understanding Acceleration on an Incline Lab

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 1/18 Pre-lab Quiz for Acceleration on an Incline Lab Due Feb 12 at 11:59pm Points 20 Questions 13 Available Feb 5 at 2pm - Feb 12 at 11:59pm Time Limit None Allowed Attempts 3 Instructions Attempt History Attempt Time Score LATEST Attempt 1 (https://alamo.instructure.com/courses/1501659/quizzes/4084400/history?version=1) 5,906 minutes 20 out of 20 Score for this attempt: 20 out of 20 Submitted Feb 12 at 2:23pm This attempt took 5,906 minutes. This quiz contains the pre-lab questions for this lab and should be completed before your scheduled lab time, if not at least on the same day. You are given three (3) attempts to complete this quiz and it should keep your highest score . Please consult the attached lab procedure in this module to help you complete this quiz. You may collaborate with your classmates or lab group to finish it together. If you have any further questions about it, then you may contact either the Physics tutors or your lab instructor themselves. Take note that some of the answers to this pre-lab may be revealed during the lab session itself or instructor orientation beforehand. Please read & listen carefully! Take the Quiz Again (https://alamo.instructure.com/courses/1501659/quizzes/4084400/take? user_id=3653371)

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 2/18 Pre-lab Quiz for Acceleration on an Incline Lab: Please refer to the lab procedure to help you answer the following questions. You may work together with your lab group to finish this quiz. 2 / 2 pts Question 1 Answer 1: Answer 2: If air resistance were not a factor, what would happen if two objects of different masses were to be dropped from the same height? They will hit the ground at the same time. Why? This is because their accelerations will remain the same regardless of their masses. They will hit the ground at the same time. Correct! Correct! Correct!

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 3/18 This is because their accelerations will remain the same regardless of their masses. Correct! Correct! Correct! 1 / 1 pts Question 2 Answer 1: Answer 2: What is the name of this physical phenomena? free fall What is the name of the scientist who is known for discovering and demonstrating this physical phenomenon? Galileo Galilei free fall Correct! Correct! Correct!

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2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 4/18 Galileo Galilei Correct! Correct! Correct! 2 / 2 pts Question 3 Consider a cart rolling down an inclined plane, with all the forces acting on it shown in the free body diagram (FBD) below. Which of the following graphs show the most likely Position vs. Time plot for this cart?

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 5/18 Correct! Correct! Correct! 2 / 2 pts Question 4 Consider a cart rolling down an inclined plane, with all the forces acting on it shown in the free body diagram (FBD) below.

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 6/18 Which of the following graphs show the most likely Velocity vs. Time plot for this cart? Correct! Correct!

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2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 7/18 Correct! 1 / 1 pts Question 5 Which factor do you think the acceleration of the cart for this particular lab depends on? ONLY ONE of the following choices is the correct answer. color of the cart distance traveled by the cart weight of the cart angle of the incline Correct! Correct!

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 8/18 Correct! mass of the cart 1 / 1 pts Question 6 What happens to the acceleration of the cart down the incline as you make the incline steeper? Please select from the choices below. The acceleration increases with a steeper incline. Correct! Correct! Correct! The acceleration goes up and down depending on the angle. The acceleration decreases with a steeper incline. The acceleration does not change with a steeper incline at all. 2 / 2 pts Question 7

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 9/18 There are two physical factors that need to be neglected (or minimized as much as possible) for this particular lab. Which ones do you think they are? Please select from the following choices below. mass of the cart distance traveled by the cart friction on the track Correct! Correct! Correct! air resistance Correct! Correct! Correct! angle of the plane 1 / 1 pts Question 8 Answer 1: According to the lab procedure, the acceleration of the cart down the incline is associated with which trigonometric function? sin θ For the correct trigonometric function, which angle [in degrees] would make the value of the function zero? 0° sin θ Correct! Correct!

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2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 10/18 Answer 2: Correct! 0° Correct! Correct! Correct! Ranking questions Rank each of the given situations A, B, C, and D according to the order and physical concept indicated. This tests your conceptual (and a bit of quantitative) knowledge of the physical principles in question. Please only put the LETTER of the situation if you want to get credit for your answers. Pre-lab sim!

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 11/18 (https://ophysics.com/f2.html) To help you answer the following ranking questions, here is a Physics simulation – https://ophysics.com/f2.html (https://ophysics.com/f2.html) – that virtually replicates what we will be doing in the lab. But you must first set the following parameters on this sim to get the correct acceleration: Set the ‘Initial velocity (m/s)’ to zero. You can either slide or type the value in the box. Set µ [coefficient of static friction] to zero. This will also automatically set the µ [coefficient of kinetic friction] to zero as well. Do not change the default acceleration due to gravity g (m/s ) value! Keep it at 9.8 m/s – the value for Earth’s gravity. s k 2 2 2 / 2 pts Question 9 Rank each of the following inclined planes from GREATEST to LEAST resulting acceleration :

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 12/18 Answer 1: Answer 2: Alternate description: A – an inclined plane angled at 60° B – an inclined plane angled at 75° C – an inclined plane angled at 90° D – an inclined plane angled at 30° GREATEST acceleration – C , B , A , D – LEAST acceleration NOTE: Please only put in the letters in the blanks or risk point penalties! C Correct! Correct! orrect Answer orrect Answer Correct! c orrect Answer orrect Answer B Correct! Correct! orrect Answer orrect Answer Correct! b orrect Answer orrect Answer

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2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 13/18 Answer 3: Answer 4: A Correct! Correct! orrect Answer orrect Answer Correct! a orrect Answer orrect Answer D Correct! Correct! orrect Answer orrect Answer Correct! d orrect Answer orrect Answer Unless indicated with 'Correct!', please rethink your answers and/or consult the notes for this ranking question. 2 / 2 pts Question 10 Rank each of the ball's acceleration down the inclined planes from HOW CLOSE to HOW FAR it will be to g = 9.81 m/s : Alternate description: 2

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 14/18 Answer 1: Answer 2: Answer 3: Answer 4: A – an inclined plane angled at 60° B – an inclined plane angled at 75° C – an inclined plane angled at 90° D – an inclined plane angled at 30° CLOSEST to g – C , B , A , D – FURTHEST from g NOTE: Please only put in the letters in the blanks or risk point penalties! C Correct! Correct! orrect Answer orrect Answer Correct! c orrect Answer orrect Answer B Correct! Correct! orrect Answer orrect Answer Correct! b orrect Answer orrect Answer A Correct! Correct! orrect Answer orrect Answer Correct! a orrect Answer orrect Answer D Correct! Correct! orrect Answer orrect Answer Correct!

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 15/18 d orrect Answer orrect Answer Unless indicated with 'Correct!', please rethink your answers and/or consult the notes for this ranking question. 2 / 2 pts Question 11 Answer 1: Answer 2: Make a Prediction! Selecting the appropriate choices for each dropdown menu that makes each sentence correct: "If the mass of the cart for this lab were doubled then its acceleration down the incline would barely change, if at all. ." "This is because air resistance is neglected for this lab. ." barely change, if at all. Correct! Correct! Correct! air resistance is neglected for this lab. Correct! Correct! Correct! This is actually a form of Galileo's free fall phenomena.

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2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 16/18 Since air resistance is neglected for this lab [the effective cross sectional area of the cart and the heights are quite small], doubling the mass of the cart would also double the weight (or fraction of the weight) that accelerates the cart down the incline. This same ratio of increase cancels each other out and makes the acceleration the same as if the mass were not doubled. or 1 / 1 pts Question 12 Graphing! Alternate description: an x-y plot with acceleration on the y-axis measured in m/s and sin θ on the x-axis. 2

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 17/18 If the acceleration of the cart is plotted on the y-axis against the sine of the angle of the inclined plane on the x-axis, then which physical quantity is represented by the slope of this graph? Hint: Check the lab procedure. height of the incline, h sin(θ) cos(θ) acceleration due to gravity, g Correct! Correct! 1 / 1 pts Question 13 Answer 1: Answer 2: Checking your work What measure of accuracy would be used to know if you did the lab correctly? [ Select ] What accepted value would you be comparing to? [ Select ] percent error Correct! Correct! Correct! acceleration due to Earth's gravity, g ≈ 9.81 m/s^2 Correct! Correct!

2/12/24, 2:23 PM Pre-lab Quiz for Acceleration on an Incline Lab: PHYS-1101-002 https://alamo.instructure.com/courses/1501659/quizzes/4084400 18/18 Correct! Quiz Score: 20 out of 20

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Pre-lab Quiz for Acceleration on an Incline Lab_ PHYS-1101-002

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