A 7 1/4 inch circular power saw rotates at 5200 revolutions per minute.
Find the linear speed (in feet per minute) of one of the 24 cutting teeth as they contact the wood being cut.
2007-09-30 12:51:21 · 3 answers · asked by dani010191 3 in Science & Mathematics ➔ Mathematics
linear speed=pi X diameter X 5200
=3.14 X 7.25 X 5200
=118378inches per minute
=9864.8feet per minute
2007-09-30 13:07:32 · answer #1 · answered by john 4 · 0⤊ 0⤋
The answer is 164.56 ft/sec. This is the speed of all the teeth not necessarily the one approaching the wood.
2007-09-30 13:03:08 · answer #2 · answered by Shripad H 2 · 0⤊ 0⤋
v = Ï r
Ï = 5200 revs/min
r = 7.25 inches (assume as not specifically told)
v = 5200 x 7.25 inches / min
v = 5200 x 7.25 / 12 ft / min
v = 3142 ft / min (to nearest whole number)
2007-10-07 05:45:12 · answer #3 · answered by Como 7 · 1⤊ 0⤋