A child rolls a ball on a level floor 3.5 meters to another child. If the ball makes 15.0 revolations, what is the balls diameter and how do you show the calculations.
2006-10-25 03:50:33 · 9 answers · asked by Pat M 1 in Science & Mathematics ➔ Physics
One revolution of the ball would be equal to the circumference of the ball.
Thus, if you take 3.5 meters and divide it by 15 revolutions, you get 0.233 meters per revolution, which means the circumference of the ball is 0.233 meters.
Since you know the equation for the circumference of a ball is C=pi*d, you can then solve for d by dividing 0.233 by pi, and getting your diameter to be 0.074 meters.
2006-10-25 04:01:23 · answer #1 · answered by Anonymous · 1⤊ 0⤋
What Is Its Diameter
2017-01-20 12:24:24 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Divide 3.5 meters by 15 and you will get the circumference of the ball. Then, the circumference equals diameter * pi. So, divide it by pi and you will get the diameter. And, also, divide it by 2, again, to get the radius.
2006-10-25 03:55:25 · answer #3 · answered by andrei_c27 2 · 0⤊ 0⤋
The circumfence of a circle is PI*diameter. As the ball revolves 15 times it equals 15 circles, which means that one circle has a circumfen of 3,5/15 = 0.23333 and thus the diameter is 0.23333/PI = 0.0742723 ~= 7.43 cm
2006-10-25 03:57:18 · answer #4 · answered by charlie 1 · 1⤊ 0⤋
3.5 meters = 15 revolutions
therefore, 3.5/15 = 1 revolution
since 1 revolution is pi times diameter, then
pi times diameter =3.5/15
Therefore Diameter= 3.5/(15*pi) [* means times]
Note: pi = approximately 3.1416.
2006-10-25 04:04:38 · answer #5 · answered by ironduke8159 7 · 0⤊ 0⤋
1 revolution = 1 circumference
C = πd
3.5 m / 15.0 rev = C
d = C / π
d = 3.5 m / 15.0π
2006-10-25 03:54:11 · answer #6 · answered by bequalming 5 · 1⤊ 0⤋
15 revs = 3.5m
1 rev = 3.5/15 = .233m
circumference = .233m
.233m = pi * diameter (D)
D = .233/pi
D = .074m = 7.4cm
2006-10-25 04:02:43 · answer #7 · answered by Anonymous · 2⤊ 0⤋
2.924 inches 15x(3.14xradiusx2)=3.5meters
radius=.037136153m
diameter=0.074272307m
diameter=7.427cm
d=2.924in
2006-10-25 04:08:10 · answer #8 · answered by leah 1 · 1⤊ 0⤋
the answer is 0.0742723067762178
I'm not going to do your homework for you
2006-10-25 04:00:20 · answer #9 · answered by Anonymous · 0⤊ 2⤋