Suppose you wanted to do an experiment to find out if changing the length of a pendulum changed the amount of time it takes the pendulum to swing back and forth. Which pendulums from the above diagram would you use for the experiment?
1 and 4
2 and 4
1 and 3
2 and 5
all

Question

Suppose you wanted to do an experiment to find out if changing the length of a pendulum changed the amount of time it takes the pendulum to swing back and forth. Which pendulums from the above diagram would you use for the experiment?
1 and 4
2 and 4
1 and 3
2 and 5
all

word2 · Answer

http://learn.flvs.net/webdav/assessment_images/educator_physics/pictures/1_05_1pendulums.gif

word2 · Answer

i think the answer is C

word2 · Answer

@agent0smith

agent0smith · Answer

Post screenshot.

word2 · Answer

i can't , it wont let me

agent0smith · Answer

Then I can't help you.

agent0smith · Answer

Sounds pretty easy though

"find out if changing the length of a pendulum changed the amount of time it takes "

Just pick all the ones with diff. lengths?

word2 · Answer

http://moodle.monashores.net/file.php/307/flvs/educator_physics_v8_gs/module01/1_05.htm its the third question

word2 · Answer

you have to see the picture to get it though

agent0smith · Answer

http://static2.mbtfiles.co.uk/media/docs/newdocs/international_baccalaureate/physics/856913/html/images/image05.png period of a pendulum So I'd pick them all since they're all diff. lengths. That way you can see the change in period as length increases.

word2 · Answer

okay thanks

word2 · Answer

but wait , that changes the reason right?

word2 · Answer

The longest pendulum should be tested against the shortest pendulum.

 All pendulums need to be tested against one another.

 As the length is increased, the number of washers should be decreased.

 The pendulums should be the same length, but the number of washers should be different.

 The pendulums should be different lengths, but the number of washers should be the same.

 so the right reason would be B , if i'm changing  from 1 to 3 to all

agent0smith · Answer

I'd guess go with All pendulums need to be tested against one another.

or The pendulums should be different lengths, but the number of washers should be the same.

(even though weight has no effect on period, as per the formula)

word2 · Answer

i'll go with D

word2 · Answer

The pendulums should be different lengths, but the number of washers should be the same.

agent0smith · Answer

Yeah that should be fine. Even though weight has no effect, it's still good to remove potential variables

word2 · Answer

do you mind helping me some more? this is a physics class

agent0smith · Answer

Okay