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the circular blade on a saw has a diameter of 7.5 inches and rotates at 2400 revolutions per minute.

Afind the angular speed in radians per sec
BFind the linear speed of the saw teeth ( in feet per sec) as the contact the wood being cut.

Formulas--> Linear speed= arc length/time= s/t

Angular speed= central angle/time ...?

Verified Answer :

syed514

For a:
    
       (24002PI)/60(seconds) = 80 PI RAD/Sec

For b: 
   
        arc length s= radius r central angle(in radians) 

                          = ((80pi7.5)/(2pi)
                          =25


                          



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