Physics #19?

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A soccer ball whose radius is 11 cm rolls a distance of 10 m in 3.50 s. What is the angular speed of the ball?
a. 13 m/s
b. 26 m/s
c. 39 m/s
d. 52 m/s

2007-01-29 20:37:04 · 2 answers · asked by SMS 1 in Science & Mathematics ➔ Physics

2 answers

NON-SENSE!!!

2007-01-29 20:57:53 · answer #1 · answered by li mei 3 · 0⤊ 0⤋

None of the above. Angular velocity has units of revolutions/time or radians /time.
C = 2*11Ï cm
revolutions = (10 m)(100 cm/m)/(2*11Ï cm)
Ï = ((10 m)(100 cm/m)/(2*11Ï cm))/3.50 rps
Ï = 4.1339 rps

1 revolution = 2Ï radians
Ï = 2Ï((10 m)(100 cm/m)/(2*11Ï cm))/3.50 rad./s
Ï = ((10 m)(100 cm/m)/(11 cm))/3.50 rad/s
Ï = 25.974 rad/s

2007-01-30 05:04:30 · answer #2 · answered by Helmut 7 · 0⤊ 0⤋