Question

precalc

Answer 1

So for the radius of D I got 82/13, which it said was wrong.

Answer 2

My work:

Answer 3

@Hero @justjm @imqwerty @InsatiableSuffering

Answer 4

can you explain your appraoch?

Answer 5

two wheels can have different angular velocities but if they're connected with a chain then the chain will have the same velocity everywhere, and you can use this fact to answer your question.
\(v = r \omega\)

Answer 6

Yes, ik that v=rw if angular velocity is measured in radians per unit of time.
Also If two wheels are fastened rigidly to a common axle, then they have
the same angular speed
and If two wheels are connected by a belt (or chain), the linear speed of
the belt coincides with the linear speed of each whee

Answer 7

So I started by finding the linear velocity of the Wheel A and Wheel B. Ik that the linear velocity of Wheel A= Velocity of Wheel C and Linear Velocity of wheel B = Wheel D.
I find the angular velocity of Wheel c (same as wheel D because same axle) and plug into the formula. The linear velocity of Wheel D (same as wheel B is 656pi in/min and I set that equal to angular velocity 312pi/2 times r. And find r to be 82/13
But that is wrong apparently

Answer 8

@Hero

Answer 9

@TheSmartOne

Answer 10

I can redo my work to make it more clear

Answer 11

oop, i deleted the problem, here it is

Answer 12

the approach is correct, what did you enter as the answer? Could it be wrong because of a rounding error?

Answer 13

I entered 82/13 as the answer

Answer 14

so is it correct then? cuz then I can just email my teacher

Answer 15

i guess you need to enter the answer as a decimal number

Answer 16

But is it right though? Because that question is 25% of the assignment lol

Answer 17

yeah it looks alright to me lol

Answer 18

hmm, okay

Answer 19

Ik that it is not to scale but for some reason the radius for wheel D is bigger than wheel A so that seems sketch

Answer 20

oh, it says to enter in integer or decimal lol. Hope I don't get this wrong.

Answer 21

what does it say when you click on "[more..]"

Answer 22

Says examples: 3, -4, 5.5172

Answer 23

so they want the answer rounded up to 4 decimal places

Answer 24

ill ask my teacher. Thank you imqwerty

Answer 25

np

Answer 26

We were right. Not in a fraction lol