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geerky42Best ResponseYou've already chosen the best response.0
heres the FBD of a block acceleration at friction horizontal surface: dw:1349649866061:dw
 one year ago

geerky42Best ResponseYou've already chosen the best response.0
my question is how does it affect the free body diagram if i place smaller block in front of it like this: dw:1349649924401:dw assume F is so big that the smaller block does not to fall? Do it has any force against F? Please explain it to me.
 one year ago

FellowrootBest ResponseYou've already chosen the best response.0
How can the smaller block not fall?
 one year ago

geerky42Best ResponseYou've already chosen the best response.0
there is a friction between two blocks assume force applied to bigger block is so high that the friction prevents smaller block from falling. Is it possible? idk haha
 one year ago

geerky42Best ResponseYou've already chosen the best response.0
and the FBD of smaller block is this, right? dw:1349650685060:dw
 one year ago

geerky42Best ResponseYou've already chosen the best response.0
or should normal force face to the left? why?
 one year ago

imron07Best ResponseYou've already chosen the best response.1
No, the normal force is in correct direction.
 one year ago

geerky42Best ResponseYou've already chosen the best response.0
what i dont understand is shouldnt second normal force from block 1 and 2 cancel each other out?
 one year ago

geerky42Best ResponseYou've already chosen the best response.0
so it shouldnt exist?
 one year ago

imron07Best ResponseYou've already chosen the best response.1
N, it does not cancel each other. The forces act in different object.
 one year ago

geerky42Best ResponseYou've already chosen the best response.0
oic thank. you didnt answer this question: is it possible for force applied to bigger block to be so high that friction can prevents smaller block from falling?
 one year ago

imron07Best ResponseYou've already chosen the best response.1
I was going to answer that. Yes, it is possible. The magnitude of normal force on smaller block actually depend on magnitude of the force acted on large block. The larger the force, the larger normal force on smaller block. If the normal force on smaller block large enough, the friction is large too (f=uN). The friction prevents block from falling.
 one year ago

FellowrootBest ResponseYou've already chosen the best response.0
is it possible for force applied to bigger block to be so high that friction can prevents smaller block from falling? Theoretically I'm sure its true. In real life hmmmm. Let me think. I guess if you think of the friction between them to be so great that them being together is like Velcro then sure.
 one year ago

geerky42Best ResponseYou've already chosen the best response.0
ok thanks, everyone, it was great helpful :)
 one year ago
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