Q: What is a wheel with teeth along its circumference?

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circumference = 2*pi*radius or diameter*pi

20 X 3.14=62.83

75

It is: circumference/radius = 2*pi

A wheel 3.4 meters in radius rotated through 30 radians will move 3.4 metres x 30 = 102 metres along the ground. But hold the phone. You asked how far a point on the circumference would travel if the wheel is rotated through 30 radians. If you plot its path of travel, that point on the circumference makes a quirky trip. Know what a cycloid is? That's where we're going. Ready? Buckle up. A cycloid is the curve defined by a fixed point on a wheel as it rolls. To be more precise, it's the locus of a point fixed on the rim of a circle rolling along a straight line. Use the link to the Wikipedia post to see an aplet of exactly what you asked. All the math is there, too. But make sure you have a bit of knowledge of the calculus.

Related questions

It's a gear.

Probably a cog, are you doing PHSchool science?

Probably a cog, are you doing PHSchool science?

When the radius of a car wheel is 49 cm what is circumference of the wheel? The circumference is 307.8760800517997 centimeters

A pulley is a wheel on an axle that is designed to support movement of a cable or belt along its circumference.

The wheel's circumference is: 219.9 centimeters.

A wheel that has teeth that fit into the teeth of another wheel is called a gear.

the circumference of the wheel

Circumference = 18*pi inches

No, a 40t is bigger. 40t vs 20t refers to the number of teeth(that engages with the chain) that each wheel has at its circumference. The tooth size is fixed for all bikes that use the same chain spacing, so a 40t chainwheel will have double the circumference of a 20t wheel.

A bevel gear is cone shaped with the gear teeth placed vertically along the periphery. A worm gear is barrel shaped with the teeth spiraling along the length like a screw.

The wheel (not the tire) has a circumference of pi × 12 inches. Whoops, the question changed. The original question asked what the circumference of a 12 inch wheel is... To calculate the circumference you take pi × diameter or pi × radius × 2.