Help with a physics problem

[AllSmiles66]

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Hey all, I'm just wondering if anyone could help me with a Physics question...it pertains to the laws of physics and pizza cutters.

 

[Nikki2002]

eating pizza hut will make you a physics genius

 

[AllSmiles66]

the question is explain using the laws of physics why pizza chefs use "pizza cutters" to solve pies into sections as opposed to equally sharp knives.

 

[Turkeyman]

The pizza cutter involves one swift stroke, transferring your forward force into centripetal force that rotates a potentially never-ending blade. With a knife, you have to lift, reposition, and press down into the pizza...while sawing back and forth against the friction of the dough to cut it. Too much energy involved...no torque?

Haha I don't know 😀

 

[indo]

Think about force per unit area.

 

[DrBowtie]

Yeah...the portion that actually cuts is a small arc length compared to the long blade of a knife.