Module 4 - First Summative Exam_ PHYS 102 Explorations in Physics - Oct 2023 - Online

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11/18/23, 11:06 AM Module 4 - First Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575434 1/11 Due Nov 12 at 11:59pm Points 100 Questions 25 Available after Nov 6 at 12am Time Limit 150 Minutes Instructions What is the first summative exam? The first summative exam tests your knowledge of the concepts introduced in the previous three modules (Modules 1, 2, and 3). As the current module (Module 4) introduces new topics that are not included in the first summative exam (but will be included in the second summative exam), you are encouraged to complete the first summative exam early in this module. What's on the first summative exam? The first summative exam consists of 25 multiple-choice questions drawn from test banks of similar questions. Therefore, no two exams are identical. The first summative exam is not a repeat of the Chapter Quiz problems. Instead, the summative exam assesses understanding of physics concepts, graphs, and simple problem-solving. How should you prepare for the first summative exam? Exam preparation suggestions include: Make sure you have read and understood the textbook Chapters 1, 2, and 3. Answer questions from the End-of-Chapter Questions sections (note that the End-of-Chapter Questions sections are different than the End-of-Chapter Problems sections). This is an essential step in preparing for this exam . The End-of- Chapter Questions sections emphasize understanding concepts and help prepare for the multiple-choice questions included in the summative exam. It's always a good idea before an exam to give yourself a practice exam using questions you have not previously seen (i.e., save some of the End-of-Chapter Questions for a practice exam). This simulates exam conditions much better than merely reviewing questions you have already solved. Overstudy! It's always better to walk out of an exam thinking "The exam wasn't as hard as I thought", than "I should have studied more." Exam Instructions Questions are presented one at a time. Use caution in navigating back to a previous question – answers are only saved by selecting Save or navigating forward to the next question. Time limit: There is a 2.5-hour time limit and at the end of the 2.5 hours, the exam will close and be automatically submitted for grading. You will get a notification pop-up approximately 10 seconds before time expires. If you leave the exam for any reason, the timer will continue and the exam will automatically submit when time is up. If you lose your Internet connection, you may reconnect and return to the exam where you left off as long as time has not expired. If you encounter technical difficulties, please contact your instructor. Show Work submission: Within 30 minutes of completing the exam, you are required to upload a "Show Work" document through the Show Work Submission assignment (https://erau.instructure.com/courses/164880/assignments/3306869) that comes next in this module. The purpose of this document is to demonstrate the processes and steps you used to solve the questions on the exam. The answers on the show work document must match the Canvas exam answers. Partial credit for some problem-solving questions may be possible after the instructor has had time to review your show work document(s). Module 4 The Physics of Matter First Summative Exam

11/18/23, 11:06 AM Module 4 - First Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575434 2/11 Attempt History Attempt Time Score LATEST Attempt 1 81 minutes 84 out of 100  Correct answers are hidden. Score for this quiz: 84 out of 100 Submitted Nov 18 at 2:06pm This attempt took 81 minutes. Remember the Student Honor Code: “I will hold myself to the highest standards of personal honesty and ethical behavior in my academic work.”  This activity supports Module Objective(s) 13 and Learning Outcome(s) 2-5. (https://erau.instructure.com/courses/164880/pages/module-4-overview-and-objectives) 4 / 4 pts Question 1 The figure shows a distance versus time graph for an object. The acceleration of the moving object is zero. constant. increasing. decreasing. not determinable. 4 / 4 pts Question 2

11/18/23, 11:06 AM Module 4 - First Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575434 3/11 The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III. The object is at rest in region(s) I. II. III. no regions 4 / 4 pts Question 3 The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III. The object’s velocity is zero in region(s) I. II. III. no regions 4 / 4 pts Question 4

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11/18/23, 11:06 AM Module 4 - First Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575434 4/11 The figure shows the distance versus time graph of an object. The acceleration of the moving object is zero. constant. increasing. decreasing. not determinable. 0 / 4 pts Question 5 Incorrect Incorrect Motion in a circle at constant speed is motion with constant acceleration. constant velocity. both of the above none of the above Both v and a are continuously changing direction and therefore not constant. 4 / 4 pts Question 6 What is the period of a signal that has a frequency of 60 Hz?

11/18/23, 11:06 AM Module 4 - First Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575434 5/11 60 s 60 s¯ 1 1/60 s not determinable 4 / 4 pts Question 7 A racecar driver steps on the gas, and his racecar travels 20 meters in 2 seconds starting from rest. The acceleration of the racecar is 0 5 m/s . 2 9.8 m/s . 2 10 m/s . 2 20 m/s . 2 0 / 4 pts Question 8 Incorrect Incorrect The acceleration of a ball as it rolls down a ramp is 4 m/s . The distance (in meters) from the starting point 2 s after it starts to roll is: 2 0. 2. 4. 8. 16. 4 / 4 pts Question 9

11/18/23, 11:06 AM Module 4 - First Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575434 6/11 An object moving in a circle undergoes constant acceleration. free fall. centripetal acceleration. linear acceleration. frequency. 4 / 4 pts Question 10 When a body moves in circular motion at constant speed the velocity and acceleration point in the same direction. the velocity and acceleration point in opposite directions. the velocity and acceleration point perpendicular to each other. the acceleration is zero. none of the above. 4 / 4 pts Question 11 The slope of a distance vs. time graph is the distance. velocity. acceleration. none of the above. 4 / 4 pts Question 12

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11/18/23, 11:06 AM Module 4 - First Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575434 7/11 A heavy truck hits a small car. At any given time during the impact, the force the truck exerts on the car is larger than the force the car exerts on the truck. the force the truck exerts on the car is smaller than the force the car exerts on the truck. the force the truck exerts on the car is equal to the force the car exerts on the truck. the only force present is the force of the truck on the car. 4 / 4 pts Question 13 As a body falls through air starting from rest, its acceleration is zero. stays constant. continuously decreases. continuously increases. gets smaller and smaller, eventually approaching zero. 4 / 4 pts Question 14 Starting from rest, a 20,000-kg aircraft being launched from an aircraft carrier goes from 0 to 90 m/s in 2 seconds. The net force acting on the aircraft is 3,600,000 N. 1,800,000 N. 900,000 N. 450,000 N. 275,000 N.

11/18/23, 11:06 AM Module 4 - First Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575434 8/11 4 / 4 pts Question 15 An aircraft weighs 1,500 N, its mass is 1,500 kg. 750 kg. 153 kg. mass cannot be determined 4 / 4 pts Question 16 As a body falls through air starting from rest, its velocity stays constant. continuously decreases. continuously increases. gets larger and larger, eventually reaching a constant value. gets smaller and smaller, eventually approaching zero. 4 / 4 pts Question 17 A body is oscillating up and down at the end of a spring. Let’s consider when the body is at the top of its up-and-down motion. The velocity is zero. has its largest magnitude. points up. points down.

11/18/23, 11:06 AM Module 4 - First Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575434 9/11 0 / 4 pts Question 18 Incorrect Incorrect A ball is thrown straight up, and reaches the top of its trajectory. The acceleration at the top of the trajectory is: cannot be determined without additional information. 9.8 m/s upward. 2 9.8 m/s downward 2 0 m/s 2 4 / 4 pts Question 19 About how many 100-W light bulbs would you have to light up to use energy at the rate of one horsepower? one or two seven or eight the question doesn’t make sense—hp and W are unrelated dozens none of the above 4 / 4 pts Question 20 A person runs up a long flight of stairs in 10 seconds. If the person’s weight is 600 N and the vertical height of the stairs is 20 meters, the person’s power output is 0. 3 W. 30 W. 1,200 W.

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11/18/23, 11:06 AM Module 4 - First Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575434 10/11 12,000 W. 4 / 4 pts Question 21 A person slides down an icy (frictionless) hill starting from rest. At the top his gravitational potential energy is 500 J. He slides all the way down to the valley bottom where his gravitational potential energy becomes zero. His kinetic energy at the bottom will be 0 J. 500 J. some value between 0 and 500 J. none of the above. 4 / 4 pts Question 22 The linear momentum of a truck will be greater than that of a bus if the truck’s mass is larger than the bus’s but its speed is the same. the truck’s speed is larger than the bus’s but its mass is the same. the truck’s mass and speed are both larger than the bus’s. any of the above. 4 / 4 pts Question 23 If a force on an object is aimed perpendicular to the direction of the object’s velocity, the force does no work. positive work. negative work.

11/18/23, 11:06 AM Module 4 - First Summative Exam: PHYS 102 Explorations in Physics - Oct 2023 - Online https://erau.instructure.com/courses/164880/quizzes/575434 11/11 any of the above. 0 / 4 pts Question 24 Incorrect Incorrect Consider a situation where two moving objects collide, stick to each other, and move off together. Kinetic energy is definitely conserved. is definitely not conserved. may or may not be conserved, depending on the nature of the collision. none of the above 4 / 4 pts Question 25 Kinetic energy is conserved in an inelastic collision. an elastic collision. any collision where two objects rebound off each other. none of the above. Quiz Score: 84 out of 100

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