Question

What does this sentence mean?

Answer 1

http://prnt.sc/c7ptm8

Answer 2

What does the line in the rectangle box means? (What is the difference between limiting friction and centripetal frictional force?)
What type of motion is meant by skidding?

Answer 3

limiting friction force is the limit of the friction force. It means when the force is > that number, you slide.

Answer 4

Okay I should rephrase my question. How can centripetal force > Friction when friction itself is the centripetal force?

Answer 5

@ganeshie8

Answer 6

max friction force = (mu)mg
centripetal force=mv^2/r
when (mu)mg=mv^2/r
then no skidding occurs
but as u increase v then centripetal force also increases
but friction force remians same as it is not dependent on v
Therefore skidding occurs

Answer 7

The limiting friction between 2 surfaces is the limit of the force the surface can apply to stop movement between the surfaces.

Answer 8

They are not as clear as they could be.
They start by saying F is the frictional force that balances the centripetal force mv^2/r only when there is no skidding.

They then seem to switch to F= centripetal force (for the case when F exceeds the frictional force).

Answer 9

\(\color{#0cbb34}{\text{Originally Posted by}}\) @phi
They are not as clear as they could be.
They start by saying F is the frictional force that balances the centripetal force mv^2/r only when there is no skidding.

They then seem to switch to F= centripetal force (for the case when F exceeds the frictional force).
\(\color{#0cbb34}{\text{End of Quote}}\)
That's exactly the confusion I am having.
They first declare F=friction = centripetal force
Then they say F=centripetal force> friction.

Answer 10

**
They first declare F=friction = centripetal force
Then they say F=centripetal force> friction.
**

Yes. They say:
if *no skidding* F= friction = centripetal force
if skidding, F= centripetal force > friction

Maybe they should say:
F= centripetal force
then if *no skidding* F is exactly balanced by friction
if there is skidding F is greater than the friction.