A suitcase is hanging straight down from your hand as you ride an escalator. Your hand exerts a force on the suitcase, and this force does work. This work is a. positive when you ride up and negative when you ride down b. negative when you ride up and positive when you ride down c. positive when you ride up or down d. negative when you ride up or down

A suitcase is hanging straight down from your hand as you ride an escalator. Your hand exerts a force on the suitcase, and this force does work. This work is a. positive when you ride up and negative when you ride down b. negative when you ride up and positive when you ride down c. positive when you ride up or down d. negative when you ride up or down

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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