Discussion on Electrostatics


 

Join Now for Exam PreparationSTART YOUR AIIMS PREPARATION
  •  More than 1 lakh Students
  •  Practice 1000s of questions
  •  Chapter-wise Study Material
  •  Guided Study Plan
WHAT ARE YOU WAITING FOR? JOIN NOW

Posted on: 05:18:56 PM on September 20, 2016
work power energy


REGISTER NOW & POST YOUR QUESTIONS
 

Reponses To This

Posted on: 09:56:59 AM on September 27, 2016
What is work done by friction force when we are walking?



Posted on: 12:42:39 PM on October 14, 2016
Your back foot is pushing you forward, so the frictional force on the ground is forward and positive. Your front foot is (initially) stopping you from falling, so the frictional force on the ground is backward and negative.



Posted on: 02:27:38 PM on January 11, 2017
Unless the man's shoes slip, friction does no work on the man when he walks. Nonetheless, Newton's laws still apply--that's where the so-called "work"-energy theorem comes from. In order for the man to accelerate, there must be an external force on him, which is friction. But that friction does no real work, thus does not provide energy. (The energy comes from his muscles, not from the ground.)





Post Your Response




 
SimplyLearnt
Sign Up to participate in this discussion