Coin slipping on rotating table | iTeachChem | Page 1

cerulean steeple Jan 27, 2025, 9:53 AM

#

Why is the frictional force acting as the centripetal force towards the center?

leaden topazBOT Jan 27, 2025, 9:53 AM

#

<@&1227987967939838003>

#

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.

cerulean steeple Jan 27, 2025, 9:54 AM

#

frictional force opposes relative motion

#

but the table seems to be moving same as the coin? idk

sick gorge Jan 27, 2025, 9:54 AM

#

cerulean steeple frictional force opposes relative motion

Yup and relative motion is due to inertia (centrifugal force) only

cerulean steeple Jan 27, 2025, 9:54 AM

#

ahh hm?

#

centrifugal force outside

#

ohh hence centripetal inside

#

which is frictional?

#

but wait

sick gorge Jan 27, 2025, 9:55 AM

#

cerulean steeple centrifugal force outside

No no, centrifugal inside.

cerulean steeple Jan 27, 2025, 9:55 AM

#

what

sick gorge Jan 27, 2025, 9:55 AM

#

The centrifugal force exists in the rotational frame of reference only

#

It's a pseudo force

cerulean steeple Jan 27, 2025, 9:56 AM

#

yeah no i meant centrifugal towards the outside direction, away from the center?

sick gorge Jan 27, 2025, 9:56 AM

#

Yes.

#

That's a pseudoforce.

cerulean steeple Jan 27, 2025, 9:56 AM

#

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

sick gorge Jan 27, 2025, 9:57 AM

#

Nope.

#

Everything is radial, not tangential

#

Wait lemme draw it for you

cerulean steeple Jan 27, 2025, 9:59 AM

#

bet

sick gorge Jan 27, 2025, 10:01 AM

#

Screenshot_2025-01-27-15-31-39-208_jp.ne.ibis.ibispaintx.app-edit.jpg

cerulean steeple Jan 27, 2025, 10:02 AM

#

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 @sick gorge

#Coin slipping on rotating table