Thursday

August 21, 2014

August 21, 2014

Posted by **syd** on Tuesday, January 20, 2009 at 10:41pm.

- precalc -
**Reiny**, Tuesday, January 20, 2009 at 11:04pmI will do one of the combinations for you

front: 40 teeth

back wheel: 12 teeth

(this will be the gear that can produce the highest speed)

for each turn of the front sprocket the back wheel will turn 40/12 or 10/3 or 3 1/3 times

each revolution of the back wheel covers

2(26)pi inches or 163.3628 inches

so at 130 rpm of the front sprocket, the back will will cover

130(10/3)163.3628 inches/minute

= 1.117275 miles/min (I divided by 5280*12)

~= 67 mph (I multiplied by 60)

you do the rest,

can you see the only part that would change ???

- precalc -
**drwls**, Wednesday, January 21, 2009 at 10:41amI think Reiny used the rire diameter for the radius, so the speed is two tiomes too high.

This question was posted and answered previously

- precalc -
**drwls**, Wednesday, January 21, 2009 at 10:44amSee your other post at http://www.jiskha.com/display.cgi?id=1232509956

- zubdce jlek -
**zubdce jlek**, Tuesday, February 10, 2009 at 5:50pmmfyelko sgpcyq earwxfs gaexz eqklximt okfudm zndb

**Related Questions**

precalc - a 21-speed bike has varying top speeds dependent on the gear it's in. ...

math - Your bike tire has a radius of 14 inches. If you travel a distance of 56 ...

Math - Jerrod's bike has a tire diameter of 26 inches. How far will the bike ...

physics - A bicycle has wheels 67.3 cm in diameter and pedal cranks 17.5 cm long...

math - your bike tire has a radius of 14 inches. If your tire makes 100 ...

Math - The height from the ground to the top of a tire on a chold's bike is 42 ...

Physics - Here's a stationary bike. If you pedal such that the front wheel ...

Math - How far does the bike go on one rotation of the pedal sprocket in gear 2c...

physics - there are 3 parts to my question. i need help on the last part. 1.a. A...

Math - The bike slots in the bike rack are filled. Don's bike is in the middle. ...