Question

Hula Hooping and Wall of death and the olive in the glass trick?

So in wall of death the cars are moving in horizontal circles .. and the angle of banking is almost 90 degrees, we evaluate the min speed required by equating the static friction to the gravitational force on the car..

I want to know whether we can think of hula hooping as exactly the same thing.. (like the car staying there and the whole wall of death moving around it?)
If that is the same.. then the physics becomes so easy

Answer 1

And the olive in the glass trick would be a combo of both :D

Answer 2

@vishweshshrimali5
ok now answer here :D

Answer 3

@ParthKohli @Abhisar @jhonyy9 @Vincent-Lyon.Fr

Answer 4

Sorry I am not in touch with banking concept and I also don't have a pen and paper with me to derive it :(

Answer 5

no i don't need derivation.. i wanna know if we can look at both the things the same way.. without the need of torques and angular momentum .. thanks anyways! :(

Answer 6

ok so when the car moves around the wall....the centrifugal force contributes to the normal force which increases the frictional force which is finally able to balance the gravitational force. If the car is at rest and the wall moves then i think no centrifugal force will be applied...

Answer 7

so no increase in frictional force and hence the car will fall !

Answer 8

no no in that case.. the car is held.. in place (by hand maybe? :P).. so instead of car think of it as a pole.. and we are now talking about the wall (which could be the loop) which is rotating.. and making sure it doesn't fall

Answer 9

see i am gonna discuss friction and banking after a few classes.. so i wanna hula hoop in class xD..

Answer 10

Hey come on someone??? :P

Answer 11

:)

Answer 12

hmm