Homework Help: Trig

Posted by Al B. on Saturday, January 21, 2012 at 3:49pm.

Find the speed in both radians per second and degrees per second for the hour
hand, the minute hand, and the second hand on a clock.

Trig - Reiny, Saturday, January 21, 2012 at 5:15pm
1 hours = 60 minutes = 3600 seconds

I will do one of them for you, you try the others

angular speed of hour hand:
= 1 rotation/ per 12 hrs
= 2π radians/12(3600) seconds
= (π/21600) radians/second

or
= 360° degrees /12 hrs
= (360/12(3600)° / second
= 1/120 degrees/second

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