Coin slipping on rotating table
Why is the frictional force acting as the centripetal force towards the center?
16 Replies
@Gyro Gearloose
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.frictional force opposes relative motion
but the table seems to be moving same as the coin? idk
Yup and relative motion is due to inertia (centrifugal force) only
ahh hm?
centrifugal force outside
ohh hence centripetal inside
which is frictional?
but wait
No no, centrifugal inside.
what
The centrifugal force exists in the rotational frame of reference only
It's a pseudo force
yeah no i meant centrifugal towards the outside direction, away from the center?
Yes.
That's a pseudoforce.
but why, if linear acceleration acts at a 90 degree angle from the supposed centrifugal force
shouldnt the centrifugal then also be tangential
linear velocity*
sorry
Nope.
Everything is radial, not tangential
Wait lemme draw it for you
bet
okay so the body is at rest
and we know that centrifugal force is a pseudo force that opposes the frame's acceleration
so why would the frame be accelerating inwards for the centrifugal force to be acting outwards
i feel like i missed a class in rotation lmk if this is a hard to explain concept i should be clearing myself
no wait
okay the direction of centrifugal force is always radially outwards
which would cause the friction to be radially inwards
i was overthinking it
thank you
+solved @Opt
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