Trigonometry question please help
Favorites|Homepage
Subscriptions | sitemap
HOME > Mathematics > Trigonometry question please help

Trigonometry question please help

[From: ] [author: ] [Date: 11-09-01] [Hit: ]
Are you taking into account that the 1 inch path represents the diameter and not the radius of the bit?90000π/min • 1/2 in • 1 ft/12 in • 1 mi/5280 ft • 60 min/1 hr = 133.8746869... ≈ 133.......
A router bit makes 45,000 rev/min. What is the linear velocity in miles per hour of the outside edge of a bit that cuts a 1 inch wide path? I know how to work these problems out but I keep getting 267.75 mph but the answer is 133.9 mph. Any kind of help would be appreciated. Thanks!

-
Without actually solving the problem it seems to be that your answer is double the correct one. Are you taking into account that the 1 inch path represents the diameter and not the radius of the bit?

-
45000 rpm = 45000(2π)/min = 90000π/min

90000π/min • 1/2 in • 1 ft/12 in • 1 mi/5280 ft • 60 min/1 hr = 133.8746869... ≈ 133.9 mph
1
keywords: please,Trigonometry,help,question,Trigonometry question please help
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .