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III. Horse and wagon Here's a classic problem from the Halliday & Resnick textbook series. Something like it often shows up on physics exams: A horse is urged to pull a wagon. The horse refuses to try, citing Newton's third law as a defense: The pull of the horse on the wagon is equal but opposite to the pull of the wagon on the horse. "If I can never exert a greater force on the wagon than it exerts on me, how can I ever start the wagon moving?" asks the horse. A. (Work together) How would you respond to the horse? In other words, how could you convince him thot Nouton'o third low doogn't him from pulling Ton2 Thie ig hord de the hest vou

III. Horse and wagon Here's a classic problem from the Halliday & Resnick textbook series. Something like it often shows up on physics exams: A horse is urged to pull a wagon. The horse refuses to try, citing Newton's third law as a defense: The pull of the horse on the wagon is equal but opposite to the pull of the wagon on the horse. "If I can never exert a greater force on the wagon than it exerts on me, how can I ever start the wagon moving?" asks the horse. A. (Work together) How would you respond to the horse? In other words, how could you convince him thot Nouton'o third low doogn't him from pulling Ton2 Thie ig hord de the hest vou

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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III. Horse and wagon Here's a classic problem from the Halliday & Resnick textbook series. Something like it often shows up on physics exams: A horse is urged to pull a wagon. The horse refuses to try, citing Newton's third law as a defense: The pull of the horse on the wagon is equal but opposite to the pull of the wagon on the horse. "If I can never exert a greater force on the wagon than it exerts on me, how can I ever start the wagon moving?" asks the horse. A. (Work together) How would you respond to the horse? In other words, how could you convince him that Newton's third law doesn’t prevent him from pulling the wagon? This is hard-do the best you can, and move on if you get completely stuck. In part B we’ll give some major help. B. (Work together) We'll now lead you through a way of thinking about this problem. 1. Start by drawing a system schema and two separate free-body diagrams, one showing the forces acting on the horse, the other showing the forces acting on the wagon. To keep things simpler, you can draw just the horizontal forces. Assume the horse pulls the wagon leftward. Hint: When you start walking, what force propels you forward? System schema
Transcribed Image Text:III. Horse and wagon Here's a classic problem from the Halliday & Resnick textbook series. Something like it often shows up on physics exams: A horse is urged to pull a wagon. The horse refuses to try, citing Newton's third law as a defense: The pull of the horse on the wagon is equal but opposite to the pull of the wagon on the horse. "If I can never exert a greater force on the wagon than it exerts on me, how can I ever start the wagon moving?" asks the horse. A. (Work together) How would you respond to the horse? In other words, how could you convince him that Newton's third law doesn’t prevent him from pulling the wagon? This is hard-do the best you can, and move on if you get completely stuck. In part B we’ll give some major help. B. (Work together) We'll now lead you through a way of thinking about this problem. 1. Start by drawing a system schema and two separate free-body diagrams, one showing the forces acting on the horse, the other showing the forces acting on the wagon. To keep things simpler, you can draw just the horizontal forces. Assume the horse pulls the wagon leftward. Hint: When you start walking, what force propels you forward? System schema
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