anonymous
  • anonymous
are centripetal and centrifugal forces considered to be action-reaction forces? consider a mass m tied to a string centripetal force is provided by the string on to the mass m while centrifugal force acts on string by the mass m drwing a free body diagram of the mass m i can say the forces acting on it are: mg tension pulling it inwards but actually as the mass m is attached to the string,wont the centrifugal force given by the mass on the string also affect it?(that is act on it?) as mass m and string are joined to each other?
Physics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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anonymous
  • anonymous
|dw:1332864297840:dw|
Shayaan_Mustafa
  • Shayaan_Mustafa
yes. you are right. these are action and reaction forces. you are also right that centrifugal force also affects on the mass.
Shayaan_Mustafa
  • Shayaan_Mustafa
always remember. whenever a circular motion is come for discussion then centripetal and centrifugal also comes. then other conditions are applicable but those forces first.

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anonymous
  • anonymous
|dw:1332864882062:dw|then there shud be net acc outside the circle creating circling of mass imposible!
Shayaan_Mustafa
  • Shayaan_Mustafa
wait. if mass is whrilling in the circular motion, it is due to centripetal force.
anonymous
  • anonymous
right then u agree that centrifugal acts on the string by mass m? since they are connected,it will indirectly affect mass m also?
Shayaan_Mustafa
  • Shayaan_Mustafa
yes yes.
anonymous
  • anonymous
so why is dat when we solve sums we draw free body diagrams showing only T,mg and the caused radial mv^2/r when an equal centrifugal force acts radially outwards nullyfing the entire effect and then if there is no pulling force(as centripetal force has been nullified) then how does it go around the circle?===no pulling inside as per my theorey!
Shayaan_Mustafa
  • Shayaan_Mustafa
cause tension is also a force. Tension is the force which comes when a body is tied with a string either the body is moving in a circle or it is hanged or any case like this. While, centripetal force is the force which comes when a body only rotates around a fixed point(axis). So in circular motion centripetal force is equal to tension. coz the body is tied to the string. Got it?
Shayaan_Mustafa
  • Shayaan_Mustafa
also. both forces equal therefore a body keeps round and round and round in the circle. if any of the force increases then case would go different way for example, if centrifugal force increases then string will break up and object will go far (no more remain in circular motion) Got it?
anonymous
  • anonymous
http://www.infoplease.com/ce6/sci/A0811114.html sorry shyaan i figured out the answer sry for confusing u the centrifugal force actually is by the string on the point of attachment :)thank u for ur response!
anonymous
  • anonymous
centrifugal is by string on the centre of rotation(source point) centripetal is by string on mass m
experimentX
  • experimentX
centrifugal force is then tension ... to ward the center centripetal force is by the mass (not by the string) ... acts outward. the body moves in circular motion because along the circular path, these two forces are equal along the path of circle
Shayaan_Mustafa
  • Shayaan_Mustafa
@experimentX is wrong.
Shayaan_Mustafa
  • Shayaan_Mustafa
@salini centrifugal is by string on the centre of rotation(source point) centripetal is by string on mass m you are right
experimentX
  • experimentX
do you know that is tension?
experimentX
  • experimentX
if i pull a string ... where is the tension directed?
Shayaan_Mustafa
  • Shayaan_Mustafa
opposite side of the pull.
experimentX
  • experimentX
looks like i made mistake above ... i would like to interchange centripetal and centrifugal
Shayaan_Mustafa
  • Shayaan_Mustafa
yes. you did.
anonymous
  • anonymous
centrifugal force is not a real force.. and thus is not an action or reaction. The action and reaction are - The string is pulling the mass (centrepetal force on the mass) The mass is pulling the string by its inertia (tension in the string) Altough using the concept of centrifugal force is convinient it is not a real force but an outcone of the inertia of the body
mos1635
  • mos1635
or_dobkowski is corect. centrifugal is only "real" to you if you are on board the moving body.|dw:1333181616890:dw|
anonymous
  • anonymous
yeah centrifugal is the centre-fleeing force with acts on the source that provides centre-pulling centripetal force on the body for example when a body is tied to a string, centripetal force is given by the string on to the body and centrifugal force acts on the string straightening it out(in the outward direction)

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