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physicsjunkie1
Recent content by physicsjunkie1
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Grade 12 Physics-Finding the Spring Constant
The elastic was originally 4.6cm long and was stretched to 9.3cm long, for a difference of 4.7cm.
physicsjunkie1
Post #28
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
4.7cm in diameter to be specific.
physicsjunkie1
Post #26
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
It is just a few centimetres in diameter. Its a circular rubber band, kind of thick and pretty stiff.
physicsjunkie1
Post #25
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
Im almost positive that is the correct mass and I googled masses of other rubber bands and they're all less than a gram. If the mass is larger it would make sense and that's the only place I can see that is the problem.
physicsjunkie1
Post #23
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
Ee=Ek (1/2)kx^2= (1/2)mv^2 (1/2)k(0.047)^2=(1/2)(3.0 x 10^-4)(4.967)^2 0.0011045k= 0.00309271 k= 0.00309271/0.0011045 k= 2.8
physicsjunkie1
Post #21
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
are you converting the mass correctly? I am still getting a different answer
physicsjunkie1
Post #19
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
Okay, I see what you're saying now but when I use Ee=Ek and sove for the spring constant, I only get 1.9.
physicsjunkie1
Post #17
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
Why don't you consider the fact that there is gravitational potential and that the elastic travels a certain disance?
physicsjunkie1
Post #15
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
yes Ee is elastic potential
physicsjunkie1
Post #14
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
So is it Ee=Ek then ?
physicsjunkie1
Post #12
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
So at the beginning it had Eg and Ee and then when the rubber band landed 1.3m away, it had all converted to Ek, we thought.
physicsjunkie1
Post #10
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
We flung the rubber band from a height of 0.412m, so it initially had Eg.
physicsjunkie1
Post #9
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
The elastic potential plus the gravitational potential energy is converted into kinetic energy.
physicsjunkie1
Post #7
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
So what would you do after finding the initial velocity in the d=vt formula?
physicsjunkie1
Post #5
Jan 19, 2014
Forum:
Introductory Physics Homework Help
P
Grade 12 Physics-Finding the Spring Constant
We thought we needed a final velocity to put into the Ek formula. Do we just use Vi for the v variable in Ek=1/2m(v)^2.
physicsjunkie1
Post #3
Jan 19, 2014
Forum:
Introductory Physics Homework Help
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