How Do You Convert 65mph to ft/s and km/h?

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Homework Help Overview

The discussion revolves around converting a speed of 65 miles per hour (mph) into feet per second (ft/s) and kilometers per hour (km/h). Participants are exploring unit conversion within the context of speed measurement.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Some participants provide links to external resources for unit conversion, while others share specific conversion factors, such as the relationship between mph and ft/s or km/h. There is also a mention of the number of feet in a mile as part of the conversion process.

Discussion Status

Several participants have attempted conversions and shared their results, with some questioning the accuracy of the values provided. There is an ongoing exploration of significant figures in the context of the conversions.

Contextual Notes

Participants are working with the assumption that they need to convert speed measurements accurately, and there is a noted frustration with the imperial units involved in the problem.

emma123
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i need some help on a problem... does anyone know how to convert 65mph into ft/s and km/h? i would appreciate it THANKS! =)
 
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I find it convenient to know that 60 mph=88 f/s,
and 50 mph=80 km/h.
 
emma123 said:
i need some help on a problem... does anyone know how to convert 65mph into ft/s and km/h? i would appreciate it THANKS! =)
First you need to know how many feet are in a mile.
I looked up that a foot is 1/3 of a yard and a mile is 1760 yards, so there are 3*1760=5280 feet in a mile (God, I hate these units)

Then you can just write:
1 [mile/hour] = 1 [5280 ft/3600 seconds]=5280/3600 ft/s=22/15 ft/s.

EDIT: There are 3600s in an hour. duh.
 
Last edited:
when i convert 65 mph into ft/s is it 95.33 ft/s and and when converting 65mph into km/h is it 104.60736 km/h?
 
emma123 said:
when i convert 65 mph into ft/s is it 95.33 ft/s and and when converting 65mph into km/h is it 104.60736 km/h?

is this correct?
 
emma123 said:
when i convert 65 mph into ft/s is it 95.33 ft/s and and when converting 65mph into km/h is it 104.60736 km/h?
You should learn about significant figures.
 

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