What cause the pizza dough go to circular motion

[rashida564]

my teacher said it is the intermolecular forces between the particle but i don't agree with them so anyone can help me .

 

[phinds]

What makes pizza dough go in a circular motion is the flick of the wrist of the guy who tosses it into the air. I have to believe your teacher was just pulling your leg.

 

[rashida564]

it think it is the torque

 

[rashida564]

what mean there the intermolecular force doesn't have any thing to do with circular motion

 

[rashida564]

i have another question why did it stay in circular motion when it up

 

[russ_watters]

Newton's first Law.

 

[rashida564]

it don't have any link to intermolecular force

 

[rashida564]

Newton's first law said the object tend to move in straight line

 

[rashida564]

the teacher said if the body move in circular path he need a force

 

[A.T.]

the teacher said if the body move in circular path he need a force

A net force, which is the sum of the inter-molecular forces acting on a piece of dough

 

[rashida564]

but way it is the inter-molecular

 

[rashida564]

i don't get it i think it's worng the inter-molecular is attraction between particle and it is not to the center

 

[rashida564]

and if it the inter-molecular force then it should rotate for ever

 

[A.T.]

i don't get it i think it's worng the inter-molecular is attraction between particle and it is not to the center

Most dough particles have no contact to the center, just to other dough particles via inter-molecular forces.

 

[A.T.]

and if it the inter-molecular force then it should rotate for ever

It would in space.

 

[rashida564]

that mean because the inter-molecular force ? and if it the reason why do not other body react in the same way

 

[A.T.]

why do not other body react in the same way

Any body can spin forever in space if the inter-molecular forces provide enough centripetal force. Otherwise it will fly apart.

 

[ZapperZ]

what mean there the intermolecular force doesn't have any thing to do with circular motion

Er... hello? Try just tossing it vertically upwards without any spin? The "intermolecular" forces are still there (or else the pizza dough will fall apart), yet, it is NOT spinning. So how can that be the "cause" of the spin?

This is one of the most awkward thread that I've come across lately.

Zz.

 

[sophiecentaur]

and if it the inter-molecular force then it should rotate for ever

If it were not for the inter molecular forces, the dough would fly apart. It would not be constrained to move in a circle but it would take a tangential route towards the wall.
But spinning pizza is complicated and probably not a good model with which to learn the basics. Many of the points raised in this thread are totally valid but they may appear to be contradictory when they're not.

 

[sophiecentaur]

G