May 22nd, 2017, 07:39 AM  #1 
Member Joined: May 2016 From: Ireland Posts: 96 Thanks: 1  projectile
could someone explain question 7b to me. on the link you will find the answer to 7b but i do not understand the answer. i do not understand why they write R2<R1 and i don't see how this implies F2=uR2 and i also don't understand how this gives the least value of u necessary for equilibrium http://thephysicsteacher.ie/Exam%20M...hemes/2005.pdf 

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