Quiz_ Reading_ Particle Kinetics Using Work and Energy

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Liberty University *

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240

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Mechanical Engineering

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Apr 3, 2024

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3/11/24, 9:44 AM Quiz: Reading: Particle Kinetics Using Work and Energy: ENGR240: Dynamics (001) https://canvas.liberty.edu/courses/601780/quizzes/2671240?module_item_id=60442959 1/7 Quiz: Reading: Particle Kinetics Using Work and Energy Due Mar 1 at 11:59pm Points 14 Questions 14 Available Feb 14 at 12am - Mar 1 at 11:59pm Time Limit 60 Minutes Instructions This quiz was locked Mar 1 at 11:59pm. Attempt History Attempt Time Score LATEST Attempt 1 49 minutes 13 out of 14  Correct answers are hidden. Score for this quiz: 13 out of 14 Submitted Feb 19 at 9:37pm This attempt took 49 minutes.  Question 1 1 / 1 pts Power Energy Conservative force Moment  The quiz: Covers the Textbook material from Module 5 (Chapter 14) . Contains 14 multiple-choice and true/false questions. Is limited to 60 minutes . Allows 1 attempt . Is worth 14 points . _________________________ is the capacity for doing work. Online Residential Athletics Sign In Request Info Apply Now Visit Us Create Guest Account

3/11/24, 9:44 AM Quiz: Reading: Particle Kinetics Using Work and Energy: ENGR240: Dynamics (001) https://canvas.liberty.edu/courses/601780/quizzes/2671240?module_item_id=60442959 2/7 Question 2 1 / 1 pts conservation of force nonconservative force frictional force conservative force The work done by a conservative force is independent of the path.  Question 3 1 / 1 pts conservation of mechanical energy principle of work and energy conservation of energy kinetic and potential energy equvalency It is either called conservation of mechanical energy or conservation of energy.  IncorrectQuestion 4 0 / 1 pts True If the work of a force is independent of the path and depends only on the force's initial and ±nal positions on the path, then the force is called _____________________. The equation T + V = T + V , where T , T and V , V are kinetic and potential energies at locations 1 and 2 along a path, respectively is called __________________________. (select all that apply) 1 1 2 2 1 2 1 2 The change in kinetic energy of a particle that displaced from position 1 to position 2 due to the resultant force F is always positive. R

3/11/24, 9:44 AM Quiz: Reading: Particle Kinetics Using Work and Energy: ENGR240: Dynamics (001) https://canvas.liberty.edu/courses/601780/quizzes/2671240?module_item_id=60442959 3/7 False This statement is wrong. Although kinetic energy of a particle at any location is always positive, the change can be either positive or negative depending on the energy at the initial and ±nal locations.  Question 5 1 / 1 pts True False Yes, the work done by a weight does depend only on the vertical displacement and not by the path.  Question 6 1 / 1 pts in the direction of the force. opposite to the direction of force. perpendicular to the direction of force. tangent to the path of the motion.  Question 7 1 / 1 pts d U = F d r The weight of a body is an example of conservative force. A force F will do work on a particle only when the particle undergoes a displacement _______________________. A force F is moving the particle along the path from position r to position r '. If the displacement vector is d r and its magnitude is ds, the work done on the particle mathematically is given by _________________________. ( Note: Bold face texts represent vectors)

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