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Grade: 12th pass
        
My doubt is about the chapter friction:-
Some times,we take the acceleration=0 when minimum force that has to be applied to bring an object into motion .
And also some times we take the friction as kinetic and then calculate the net force;then acceleration which we get ≠ 0.
Explain
one year ago

Answers : (1)

Vikas TU
6887 Points
							
For minimum force a should be zero as net Force would eventually depends upon the system’s acclenration.
Heence Force would be approx. minum when its accln = 0
And for Kinetic friction accln. is non zero as Kinetic froction is the cause for the system to be in motion after steppung up over the sttic frction.
hence aclln. would  produce due to the kinetic friction.
one year ago
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