# B What cause the pizza dough go to circular motion

1. Oct 10, 2016

### rashida564

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

2. Oct 10, 2016

### 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.

3. Oct 10, 2016

### rashida564

it think it is the torque

4. Oct 10, 2016

### rashida564

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

5. Oct 10, 2016

### rashida564

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

6. Oct 10, 2016

### Staff: Mentor

Newton's first Law.

7. Oct 10, 2016

### rashida564

it don't have any link to intermolecular force

8. Oct 10, 2016

### rashida564

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

9. Oct 10, 2016

### rashida564

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

10. Oct 10, 2016

### A.T.

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

11. Oct 10, 2016

### rashida564

but way it is the inter-molecular

12. Oct 10, 2016

### 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

13. Oct 10, 2016

### rashida564

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

14. Oct 10, 2016

### A.T.

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

15. Oct 10, 2016

### A.T.

It would in space.

16. Oct 10, 2016

### rashida564

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

17. Oct 10, 2016

### A.T.

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

18. Oct 10, 2016

### ZapperZ

Staff Emeritus
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.

19. Oct 10, 2016

### sophiecentaur

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.

20. Oct 10, 2016

G