Bb Homework Ch. 7 - 2022 Spring T X Bb Homework. Solutions - 2022 Spr x Microsoft Word - HW Ch 6 Soluti x Bb Microsoft Word - Ch 6 Circular M X Bb Microsoft Word - Ch 5 Application x |41 WeBWork : MAT1375-$22-Polinsix |+ X C Abbhosted.cuny.edu/webapps/blackboard/execute/content/file?cmd=view&content_id=_65779009_1&course_id=_2119615_1 EX GOT AIE Meeting Registration.. fall_2021.pdf Office-365-on-Win. Computing Informa... AV Ellucian Degree Wo... G Presentation Sessio.. Literature Review (9412) Basic Compu... _ Project Jupyter | Try... @ Python Online Com.. EMT 1150 Lab Repo... a, Amazon.com: Alvin,. Content Chapter 7: Work and Energy Discussions 1) Work done by a constant force City Tech Library A person pulls a box on a smooth surface (neglect friction) by applying a force of 60 N at an angle of 37 upward from the horizontal. The box is pulled a distance of 12 m. What is the work Home Page done by the person? A) 433 J B) 720 J C) 575 J D) 185 J Groups 2) Work-energy principle Tools A net horizontal force of 200 N is acting on a 10-kg object. The initial speed of the object is 5 Help m/s. The final speed of the object is 12 m/s. What is the net work done on the object? What is the distance traveled by the object? A) 233 J; 2 m B) 595 J; 3 m C) 620 J; 15 m D) 385 J; 9 m 3) Gravitational potential energy A 15-kg object is moved from a height of 7 m above a floor to a height of 13 m above the floor. What is the change in gravitational potential energy? How much work was done by the applied force to lift the object? A) 360 J B) 159 J C) 548 J D) 882 J 4) Hooke's law. Spring constant A 0.5-kg mass attached to a spring in a vertical direction causes the spring to stretch 0.07 m. What is the spring constant? A) 50 N/m B) 20 N/m C) 45 N/m D) 70 N/m 5) Work done by a varying force. Elastic potential energy How much work is required to stretch a spring from x1 = 0.2 m to x2 = 0.25 m? The spring constant is 40 N/m. The equilibrium position is at x = 0. A) 1.3 J B) 0.05 J C) 0.8 J D) 0.45 J 6) Conservation of mechanical energy A 60-kg skier starts from rest from the top of a 50-m high slope. What is the speed of the skier at the bottom of the slope? Neglect friction. A) 9.8 m/s B) 41 m/s C) 22 m/s D) 31 m/s 7) Conservation of mechanical energy. Elastic force A 3-kg object is attached to a spring with a spring constant of 20 N/m. The spring is stretched by 0.2 m from its equilibrium position and released. What is the speed of the object as it reaches the equilibrium position? A) 0.5 m/s B) 15 m/ C) 1.8 m/s D) 3.6 m/s 8) Dissipation of mechanical energy by friction An object is moving on a horizontal surface. Initial kinetic energy of the object is 20 J. The kinetic friction force on the object is 6 N. How far will the object slide before coming to a stop? A) 4.7 m B) 3.3 m C) 15.2 m D) 1.4 m 9) Work and Power A 1500-kg car accelerates from 0 to 25 m/s in 7 s. What is the average power delivered by the engine? A) 44760 J/s B) 66964 J/s C) 55680 J/s D) 52220 J/s Type here to search O 9 M C 44'F Mostly cloudy ~ 91 " ( 4) 4/5/2022 3:57 AM