Question

if the period of a clock pendulum on another planet is four times its period on earth, what is the gravity acceleration on the planet? Then calculate the pendulum on the planets moon where g=1.6m/s/s. How would this period change?

Answer 1

\[T_0=\sqrt{\frac{l}{g}}\]

\[(T_0)^2 g=l\]

\[ g=\frac{l}{(T_0)^2}\]

\[ g=\frac{l}{(4T_0)^2}\]

\[ g=\frac{l}{16(T_0)^2}\]

so we can see that

Answer 2

so we can see that gravity on that planet is 1/16 that of earth

Answer 3

i would it be 1/16 if it is four times? is that because the acceleration is faster? (sorry just missed a lab and trying to work my way through it alone) I was thinking it would be 4times the acceleration meanding the equation you would use on earth=answer (times 4).

Answer 4

im very confused, so I am probally extremely wrong

Answer 5

gravity is x1/16 if period x 4

Answer 6

if gravity(acceleration) is bigger, pendulum will moves faster thus shorter period

Answer 7

okay concept makes sense now.

Answer 8

so let me think..the moon would be 1.6 of earth. so less?

Answer 9

no gravity on the mooon is 1.6

Answer 10

arghh! so concept not make sense haha

Answer 11

\[T_0=\sqrt{\frac{l}{g}}\]


\[1.6/9.8=.16\]

\[G_{earth}*.16=G_{moon}\]


\[T_0=\sqrt{\frac{l}{g* .16}}\]

Answer 12

so l= 1.6? or am i missing something important here?

Answer 13

im very sorry, and thanks for your patience with me if this should be simple and I should be grasping it

Answer 14

forget my last line

Answer 15

\[T_0=\sqrt{\frac{l}{g_{earth}}}\]

to get moon's gravity , we multiply earth's .16

\[\frac{T_0}{\sqrt{.16}}=\sqrt{\frac{l}{g_{earth}*.16}}\]

Answer 16

okay. awesome, so the answer to my first question would be: 1/16th. I can use the equation you gave above to calculate the planets moon. Now if the moon was earths moon. I would not need the *.16 in your last equation. I would just plug in 1.6 or 2.1 or whatever it is & 9.8.

Answer 17

*9.8 not &9.8

Answer 18

.16=1.6/9.8

Answer 19

This problem wants you to find out what happen period with different gravity;

Answer 20

i think i think I see that. I have a q few more questions on this lab. Mostly exploratory. I will try to to them myself first. Will you be around for awhile in case I get stuck? haha

Answer 21

sure, just took physics test last night;

Answer 22

im drowning in physics ...a family member of mine was sick for about 7 weeks. missed 7 labs. trying to do them all before sunday (sunday is the last day my prof will let me take my lab. final grades are due the next day for all labs). he is giving me room to work, but I have lots of lab data, andputting it where it belongs and remembering what its for is hard...even though its organized physics final wedneday.... so thanks for your help.

Answer 23

sure man, hopefully I remember my physics right

Answer 24

looks right

Answer 25

now it actually asks me to do earths moon, so \[ T=\sqrt{\left(lgearth*1.6 \right)}\]

Answer 26

for the problem above , I did it for earth's moon

Answer 27

would the 1/16th still apply?

Answer 28

no

Answer 29

the .16 i mean

Answer 30

yes

Answer 31

i have this all screwed up then...ha, sorry.

Answer 32

ill scan in the three lab questions. its not making sense to me.

Answer 33

yep, I will look at it

Answer 34

our labs are written by yahoos

Answer 35

That's the case everywhere

Answer 36

I think students should write these things. Ours do not even follow the lecture schedule

Answer 37

I think the way they conduct physics lab is really stupid

Answer 38

agreed. i think the way physics in general is conducted is rather...odd and I like physics haha

Answer 39

I like physics too

Answer 40

will you be taking phys II?

Answer 41

yes, but i failed calc 1, so no go till next january

Answer 42

i would withdraw, but they would make me drop my physics, which im passing haha

Answer 43

cpreq mandatory

Answer 44

coreq*

Answer 45

what's your major?

Answer 46

physics

Answer 47

oh, you really like physics, then

Answer 48

im good at this stuff, when not rushed, but I am cramming stuff, brain can't take it anymore, so I am here playing stupid.

Answer 49

I just need three physics

Answer 50

although this period stuff has me stumped for some reason, as well as the periodic motion of a pendulum

Answer 51

what your major?

Answer 52

electrical engineering

Answer 53

(waiting on scanner to get done)

Answer 54

see. I think i would enjoy that too

Answer 55

i probally should have asked if you can open .pdf first

Answer 56

it's fine

Answer 57

what school are you at?

Answer 58

U of I

Answer 59

u?

Answer 60

some obscure univerity that no one has heard of but they made a movie about......haha

Answer 61

Marshall Univ.

Answer 62

west virginia

Answer 63

yelp, west virginia I have only met one prof. there that enjoys his job, the rest are there because no one else would hire them, i think......

Answer 64

(yeah that was mean)

Answer 65

I am gonna make my own pdf , to answer your question

Answer 66

haha, well I appreciate it a whole lot.

Answer 67

this is first one, explained better

Answer 68

second one

Answer 69

thanks man

Answer 70

my labs are a mess. I am pretty sure I am going to fail this...as much as that sucks i have data missing that shouldnt be, there are two pages like this for everyone that is just review concepts. (like 5 of them). i think the data is all here somewhere but i can't make sense out of what its for. my fault for cramming lab experiments together and I know NO ONE elese in the class i can call for help

Answer 71

second last is just drawing vectors

Answer 72

now that is something i can do haha

Answer 73

went ahead and gave you good answer before i forgot

Answer 74

plot for last one

Answer 75

you are all set

Answer 76

yes, thank you. Now to write my stupid error analysis report...so basicall if we (well some scientist did) measured gravity wrong, then its all wrong, or if L is wrong... i have to turn that into a one page paper.....setup dumb....but I can do that!

Answer 77

i just feel its all setup horribly

Answer 78

I hated error analysis, we just used to make up numbers

Answer 79

we have to type a report full of nonsense

Answer 80

well man, thanks for your help, i think I am gonna take a break. do you frequent the site often?

Answer 81

if so I will see you around. I have trillian contact information on my about me on openstudy thanks again!

Answer 82

lol,yes i do frequent this site