Which of the following statements are true about conservative and non-conservative forces? Include all that apply. A force is regarded as a conservative force if it does work but does not remove mechanical energy from a system of objects. A force is regarded as a non-conservative force if it does not add mechanical energy to a system of objects. The force of gravity and elastic (spring) force are both examples of a conservative forces. Applied forces, air resistance, friction forces, and tension are common examples of non-conservative forces. Physicists envy biologists' ability to instill order on the world of animal species through their taxonomic system. So physicists have made a habit of identifying forces as conservative and non-conservative forces in order to instill order on the world of forces. If a non-conservative force acts upon an object, then the object will either gain or lose mechanical energy. If the only forces which do work upon an object are conservative forces, then the object will conserve its mechanical energy. If the sum of an object's KE and PE is remaining constant, then non-conservative forces are NOT doing work. If work is NOT done on an object by a non-conservative force, then the object will experience a transformation of energy from kinetic to potential energy (or vice versa). An object starts from an elevated position with 50 J of potential energy and begins its fall towards the ground. If non-conservative forces can be assumed to NOT do work, then at some point during the fall the object will have 20 J of potential energy and 30 J of kinetic energy.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 12CQ: For each of the situations given, state whether frictional forces do positive, negative, or zero...

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Which of the following statements are true about conservative and non-conservative forces? Include all that apply.

A force is regarded as a conservative force if it does work but does not remove mechanical energy from a system of objects.
A force is regarded as a non-conservative force if it does not add mechanical energy to a system of objects.
The force of gravity and elastic (spring) force are both examples of a conservative forces.
Applied forces, air resistance, friction forces, and tension are common examples of non-conservative forces.
Physicists envy biologists' ability to instill order on the world of animal species through their taxonomic system. So physicists have made a habit of identifying forces as conservative and non-conservative forces in order to instill order on the world of forces.
If a non-conservative force acts upon an object, then the object will either gain or lose mechanical energy.
If the only forces which do work upon an object are conservative forces, then the object will conserve its mechanical energy.
If the sum of an object's KE and PE is remaining constant, then non-conservative forces are NOT doing work.
If work is NOT done on an object by a non-conservative force, then the object will experience a transformation of energy from kinetic to potential energy (or vice versa).
An object starts from an elevated position with 50 J of potential energy and begins its fall towards the ground. If non-conservative forces can be assumed to NOT do work, then at some point during the fall the object will have 20 J of potential energy and 30 J of kinetic energy.

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