How many revolutions has the soccer ball turned as it moves a linear distance of 21 m?

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How many revolutions has the soccer ball turned as it moves a linear distance of 21 m?

A soccer ball of diameter 29 cm rolls without slipping at a linear speed of 1.9 m/s. Through how many revolutions has the soccer ball turned as it moves a linear distance of 21 m?

2006-09-21 16:47:00 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics

4 answers

Dist. covered per revolution = circumference of ball
or,
Diam. * pi
= 29 * 3.14 = 91.06cm = 0.9106m
Now,
1 revolution travels .9106m, thus no. of revolutions in 21m=
21 / .9106 = 23.06 rev or 23rev

2006-09-21 22:34:06 · answer #1 · answered by Anonymous · 0⤊ 0⤋

I agree with Steve. He's right on top of it âº

Doug

2006-09-21 23:56:13 · answer #2 · answered by doug_donaghue 7 · 0⤊ 0⤋

yes steve is correct

2006-09-25 11:05:00 · answer #3 · answered by Anonymous · 0⤊ 0⤋

21/(.29pi) rev

2006-09-21 23:50:47 · answer #4 · answered by Steve 7 · 0⤊ 0⤋