Okay, so my guess is that I look at hook's law: F= -Kd
If the forces are moving together then -->
2F = -kd
so K will be half the size.
So then I apply that to this equation:
w = sq(.5k/21) = 2.39
f = w/(2pi) = (2.39/(2pi)) = 0.380 s-1??
Thank you!
So the net force vector makes sense to me now. It makes sense that the net force is equal to the magnitude of this vector. (I verified the numbers on my own too).
SO now I am finding "The distance r that D must be placed from A can be obtained using |f| in Newton's law of...
This may sound silly but wouldn't they cancel each other out becasue they are pulling from opposite directions?
hmm...
One would be pushing (KE?), and one would be pulling (PE?).
Maybe I am to use energy conservation?
There are no external forces, so then Emec is conserved.
KE =...
Fac + Fab = -Fad
Fad = -1.307e-14 Is this looking right so far?
Fad = (Gmamd)/(r2)
(can't change the direction yet or answer isn't real)
+1.307e-14 = (6.67e-11*0.007a4*0.007d)/(r2)
r = 0.263
It is the next part that confuses me. I didn't find a vector for the previous net force, I...
Homework Statement
Two identical springs of spring constant 240 N/m are attached to each side of a block of mass 21 kg. The block is set oscillating on the frictionless floor. What is the frequency (in Hz) of oscillation?
Figure...
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Hmm, that is interesting. Thanks for your input.
I finally figured it out. It was WAY simpler than I thought!
I used F=(G*M)/(r + d)2
set this equation equal to the force of Earth (ag--> 9.83)
Then solved for d (d = variable we are looking for)
Yay!
Homework Statement
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Hello Tim. Thank you for answering my question! :biggrin:
Thank you also for the tips to put \theta and x2.
Okay, so do you mean that it would be
0 + 1/2 kd2 = 1/2mv2 - mgh??
This way when h gets bigger, more of the spring potential energy will have to go into KE to balance and then...
Okay, I figured out what I did wrong. I had this part right:
W = [x^2] i + [3x] j
W = [4^2 - 2^2] i + [3(-3) - 3(3)] j
W = 12 i -18 j
What I needed to do was subtract 18 from 12
W = 12 - 18 = -6 (answer!)
I wasn't doing this becasue I thought they were sepearte becasue of the...