Question

As a ball baring rolls along a straight track, it makes 11.0 revolutions while traveling a distance of 109mm. Find its radius.

Answer 1

eleven times circumference = 109 mm ?

Answer 2

11.0 times the idstance of 109mm

Answer 3

11.0 revolutions, which means turns?

Answer 4

yes

Answer 5

it is a straight path, so the ball is like a circle rolling

Answer 6

11.0* pi*109?

Answer 7

should be an equation 109 =

Answer 8

11.0*pi

Answer 9

34.6

Answer 10

idk

Answer 11

whats the circumference of a circle

Answer 12

3.14*diameter

Answer 13

yes, and 2r = diameter.

when using radius instead of diameter:
3.14 * 2 r

Answer 14

eleven times the circumference of circle is 109 mm

Answer 15

3.14*2*109=684.52

Answer 16

109 mm = 11.0 *(3.14*2r)

Answer 17

69.1

Answer 18

yes:
109 mm = 69.1 r

Answer 19

okay i have that equation

Answer 20

and then divide 109 by 69.1 to get the radius

Answer 21

in mm

Answer 22

1.6 is the radius

Answer 23

when rounded

Answer 24

yes

Answer 25

good

Answer 26

or could we do it like this..
109/11.09=9.91=2*3.14*r

Answer 27

r=9.91/2*3.14=15.56

Answer 28

my computer is glitching to much 11.0

Answer 29

looks good

Answer 30

beware of decimal point i position

Answer 31

so my final will be15.56 roundedto 15.6

Answer 32

is this what you get?

Answer 33

109/11.00 =9.91=2*3.14*r
4.955=3.14*r
1.58 = r

Answer 34

don't worry about the rounding

Answer 35

okay gotcha