Tags: inertia
 PF Gold P: 859 The Coin(Green) in lying on a paper which is lying on a box.When I pull the paper with a higher force so that I could remove it easily,the coins stays about the same place. When I remove the paper slowly,the coin comes with the paper. Why? I think that objects can react(Move) to smaller forces easily but for larger forces,it doesn't. What do you think? Attached Thumbnails
Mentor
P: 16,489
Because the coefficient of static friction is higher than the coefficient of kinetic friction.

 Quote by adjacent I think that objects can react(Move) to smaller forces easily but for larger forces,it doesn't. What do you think?
No, that is wrong.
PF Gold
P: 859
 Quote by DaleSpam Because the coefficient of static friction is higher than the coefficient of kinetic friction.
What?I don't Understand

P: 754

 Mentor P: 16,489 Static friction force is given by $f_s\le\mu_s N$ and kinetic friction force is given by $f_k=\mu_k N$. In both cases N (the normal force) is the same, so ##f_s## (the friction force without slipping) can be larger than ##f_k## (the friction force with slipping).