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Question about reaction forces M1

if an object is on an inclined plane and the plane is rough then there'll be a reaction force, resistive force and a coefficient of friction.

if the plane is smooth then is the reaction and resistive force included or not?

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If it is smooth then the coefficient of friction is 0
So the resitive force of the plane is zero
However there is always a reaction force as Newton law states every action force has an equal and opposite reaction force.
Reply 2
Avatar for B_9710
B_9710
18
Original post by thefatone
if an object is on an inclined plane and the plane is rough then there'll be a reaction force, resistive force and a coefficient of friction.

if the plane is smooth then is the reaction and resistive force included or not?


Reaction force will be there but no resistive frictional force.
Reply 3
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thefatone
OP
6
Original post by Squishy®
If it is smooth then the coefficient of friction is 0
So the resitive force of the plane is zero
However there is always a reaction force as Newton law states every action force has an equal and opposite reaction force.


Original post by B_9710
Reaction force will be there but no resistive frictional force.


okay thanks a lot, i was doubting my own knowledge xD
Reply 4
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TeeEm
19
Original post by thefatone
.....



if an object is on an inclined plane and the plane is rough then there'll be a NORMAL reaction force, a resistive force say air resistance if moving, FRICTION, its weight and any (optional) external force the question may have ...if the plane is smooth then is the only thing missing is friction
Reply 5
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TeeEm
19
Original post by B_9710
Reaction force will be there but no resistive frictional force.


not quite ...
Reply 6
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B_9710
18
Original post by TeeEm
not quite ...


How so?
Reply 7
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TeeEm
19
Original post by B_9710
How so?


resistive means ground friction as well as other resistances ...
Original post by TeeEm
not quite ...


What u mean? Fr=ùR and ù=0 so Fr=0
Reply 9
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thefatone
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6
Original post by TeeEm
if an object is on an inclined plane and the plane is rough then there'll be a NORMAL reaction force, a resistive force say air resistance if moving, FRICTION, its weight and any (optional) external force the question may have ...if the plane is smooth then is the only thing missing is friction


okay so friction applies whether the plane is rough or smooth?

but i thought the definition of smooth meant not friction?
Reply 10
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B_9710
18
Original post by TeeEm
resistive means ground friction as well as other resistances ...


Yes I should have made it more clear perhaps. I was referring to specifically the frictional force.
Reply 11
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TeeEm
19
Original post by B_9710
Yes I should have made it more clear perhaps. I was referring to specifically the frictional force.


no worries
Reply 12
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TeeEm
19
Original post by thefatone
okay so friction applies whether the plane is rough or smooth?

but i thought the definition of smooth meant not friction?


as far as you are concerned smooth means ground friction is not present
Reply 13
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TeeEm
19
Original post by Squishy®
What u mean? Fr=ùR and ù=0 so Fr=0


look at post 5 & 8
Reply 14
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thefatone
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6
Original post by TeeEm
as far as you are concerned smooth means ground friction is not present


so when plane is smooth no friction or reaction force?
Reply 15
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TeeEm
19
Original post by thefatone
so when plane is smooth no friction or reaction force?


no ground friction !
Reply 16
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thefatone
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6
Original post by TeeEm
no ground friction !


is there a difference between ground friction and friction? (besides the fact that one of them specifies ground in front of it)
Reply 17
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TeeEm
19
Original post by thefatone
is there a difference between ground friction and friction? (besides the fact that one of them specifies ground in front of it)


no difference
Original post by TeeEm
no ground friction !


Lol only losers refer to other resistive forces as friction.
Reply 19
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thefatone
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6
Original post by TeeEm
no difference


so only the reaction force applies when the plane is smooth? no friction

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