Question

Two bugs are sitting on a turntable, going around with the record at 33 1/3 RPM. One bug sits 3.390 x 10^-2 m from the point of rotation; the other sits 2.540 x 10^-2 m meters from the point of rotation. If the first bug has a tangential speed of 7.5 cm/s, what is the rotational speed of the second bug?

Answer 1

@harman.singh

Answer 2

can you give me an equation that i can do please?

Answer 3

:( forget this equation pls

Answer 4

what equation?

Answer 5

whatever he's giving u

Answer 6

you know about circles, and its perimeter right, thats all u need to know

Answer 7

ok well can you give me an equation please if his isnt right

Answer 8

his equation is right, nothing wrong with it

Answer 9

I just want you to understand the basics here

Answer 10

okay so 7.5 cm/s is the speed of the bug, in 1 minute, we've rotated 33+1/3 times right

Answer 11

right

Answer 12

so that means uve gone around the circle or the perimeter of that circle wher the bug is at a total of 33+1/3 times

Answer 13

now if u go 7.5 cm /s how many cm is that in 60 secs aka a min

Answer 14

450

Answer 15

right

Answer 16

anyway this is just me trying to make u think about whats going on here

Answer 17

now lets look at the 2nd bug

Answer 18

2.540 x 10^-2 m, so how much perimeter is that for 33 +1/3 rotations

Answer 19

radius is 2.540 x 10^-2 m, what is the total perimeter in 33+1/3 rotations?

Answer 20

254

Answer 21

k the distances are different as u can see so the tangential speed is different

Answer 22

how about rotation? rotation is how much angle has changed about the point of rotation

Answer 23

rev/second is a rotational speed

Answer 24

we started with 33rev/min , and thats the same at all radius away

Answer 25

so how many rev is that in 1 sec

Answer 26

.55

Answer 27

yeah

Answer 28

thats all there is to it

Answer 29

im guessing ur questions continues to ask about the bugs tangential speeds and stuff next?

Answer 30

ok so what would the answer though
44.4 RPM

25 RPM

33 1/3 RPM

66 2/3 RPM
c?
and yes that is the next question

Answer 31

33 1/3 RPM

Answer 32

the rotational speed has not changed

Answer 33

its the tangential speed that changes

Answer 34

ok can you help me with this one?

Two bugs are sitting on a turntable, going around with the record at 33 1/3 RPM. One bug sits 3.390 x 10^-2 m from the point of rotation; the other sits 2.540 x 10^-2 m meters from the point of rotation. If the first bug has a tangential speed of 7.5 cm/s, what is the tangential speed of the second bug?

16.00 cm/s

5.625 cm/s

3.750 cm/s

10.01 cm/s

Answer 35

you should be able to do this now

Answer 36

we found the perimeter it was travelling in total in that min remember

Answer 37

254?

Answer 38

let me see

Answer 39

2pi*R = ? tell me right units

Answer 40

wait what is the radius again

Answer 41

2.540 x 10^-2 m

Answer 42

ok 254 times (2 pi)=1595.12

Answer 43

units?

Answer 44

im not sure

Answer 45

centimeters..

Answer 46

oh ok so 1595.12 cm

Answer 47

does it make sense why its centimeter?

Answer 48

yes

Answer 49

circumference is the perimeter but ok

Answer 50

yes sorry

Answer 51

a circle has 2pi the proportion of the radius

Answer 52

now that is the perimeter for 1 revolution right

Answer 53

how many revolutions are we travelling here for 1 second

Answer 54

from your rotational speed

Answer 55

you found this earlier too

Answer 56

33 1/3rpm

Answer 57

what does rpm stand for

Answer 58

rotations per minute

Answer 59

okay so how many rotations per sec is this

Answer 60

.55

Answer 61

right keep units pls

Answer 62

rps

Answer 63

0.55 rotations per sec

Answer 64

now so how much length is this for us

Answer 65

1 rotation we saw was 1595.12 cm

Answer 66

0.55 rotation =?

Answer 67

1 second

Answer 68

what length is int 0.55 rotation

Answer 69

1 rot = 1595.12 cm
0.55 rot = ________ cm

Answer 70

877.316 cm

Answer 71

yes

Answer 72

since we went 0.55 rot in 1 sec
We also went 877.316 cm in 1 sec

Answer 73

and the heck that makes no sense--.- they messed up some numbers or something

Answer 74

ok so what would the answer be out of these choices
16.00 cm/s

5.625 cm/s

3.750 cm/s

10.01 cm/s

Answer 75

Two bugs are sitting on a turntable, going around with the record at 33 1/3 RPM. One bug sits 3.390 x 10^-2 m from the point of rotation; the other sits 2.540 x 10^-2 m meters from the point of rotation. If the first bug has a tangential speed of 7.5 cm/s, what is the tangential speed of the second bug?

Answer 76

well i wasnt gonna go straight to this but, evnetually u wud have found out that really all that matters is the proportion of the radius here

Answer 77

2.54/3.39 * 7.5=?

Answer 78

5.619cm/s?

Answer 79

nothign is wrong, the radius is 2.54 cm not 254 cm

Answer 80

but yes

Answer 81

so the closest is 5.625 cm/s