Check all the answers which are true statements about forces and work. There may be more than one correct answer! Gravity does a positive amount of work on objects which are moving downward. Friction always does a negative amount of work on an object. For a block sliding along a table surface, the normal force (between table and block) does positive work. Forces which point in the same direction as an object's velocity vector do positive work. Springs do a negative amount of work on objects which are moving away from the "equilibrium" position.
Check all the answers which are true statements about forces and work. There may be more than one correct answer! Gravity does a positive amount of work on objects which are moving downward. Friction always does a negative amount of work on an object. For a block sliding along a table surface, the normal force (between table and block) does positive work. Forces which point in the same direction as an object's velocity vector do positive work. Springs do a negative amount of work on objects which are moving away from the "equilibrium" position.
Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter7: Energy Of A System
Section: Chapter Questions
Problem 19P: (a) A force F=(4xi+3yj), where F is in newtons and x and y are in meters, acts on an object as the...
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