which of the following is  negative work being done?   Question 10 options:   A man pushes with a force of 10 N [East] to move a 20 kg object east   A 15 kg object is held 3 m above the ground   An object is pushed with a force of 25 N when the frictional force is a maximum of 30 N   A 1500 kg car rolls to

University Physics Volume 1
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Author:William Moebs, Samuel J. Ling, Jeff Sanny
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Chapter7: Work And Kinetic Energy
Section: Chapter Questions
Problem 99CP: Shown below is a 40-kg crate that is pushed at constant velocity a distance 8.0 m along a 30 Incline...
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In which of the following is  negative work being done?

 

Question 10 options:

 

A man pushes with a force of 10 N [East] to move a 20 kg object east

 

A 15 kg object is held 3 m above the ground

 

An object is pushed with a force of 25 N when the frictional force is a maximum of 30 N

 

A 1500 kg car rolls to a stop

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