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Type: Posts; User: SkyWind

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1. ## Thread: Gymnastics and torque

by SkyWind
Replies
4
Views
1,334

### It says math and physics on the forum head...so I...

It says math and physics on the forum head...so I figure there must be at least some ppl who know what they're talking about. Why did you even bother posting. Bah.
2. ## Thread: Gymnastics and torque

by SkyWind
Replies
4
Views
1,334

### Nobody? I really need help, any help is good. I...

Nobody? I really need help, any help is good. I just need to know if I'm on the right track. :yikes:
3. ## Thread: Gymnastics and torque

by SkyWind
Replies
4
Views
1,334

### Gymnastics and torque

Hey guys,

here's the question:
You are an athlete on the high bar in a fully extended position 180 degrees from the right horizontal.

My weight: 667.08N
Center of mass:80.5cm
4. ## Thread: Ok, my center of mass problem...

by SkyWind
Replies
0
Views
828

### Ok, my center of mass problem...

Hi,
Ok so we were told to find our center of mass using the reaction board method, but modified. We just do a pushup position with our hands on a scale, I have a electronic one and toes on the...
5. ## Thread: Help on my "jumping" problem. Check my work :)

by SkyWind
Replies
1
Views
1,022

### Please anyone with any hints? It's really...

Please anyone with any hints? It's really important.
6. ## Thread: Help on my "jumping" problem. Check my work :)

by SkyWind
Replies
1
Views
1,022

### Help on my "jumping" problem. Check my work :)

Ok,
I had to test my maximum vertical jump. I did three trials and here's what I got:
-Maximum standing height (ie without jumping reaching with one hand) = 221.5 cm
-Maximum jumping height with...

by SkyWind
Replies
2
Views
5,378

### Ah yes, the way you did it is actually right. I...

Ah yes, the way you did it is actually right. I went to my prof. It was actually an error on my part, I failed to realize that I had to separate the component forces into Fx and Fy, my bad. Thanks...

by SkyWind
Replies
2
Views
5,378

### Physics Help:Pressure/fulids

Ok, here's the problem:

Hey,

Ok here's the problem.

A house has a roof with the dimensions in drawing. Determine the magnitude and direction of the net force that the atmosphere applies to...
9. ## Thread: PHYSICS Help ASAP

by SkyWind
Replies
8
Views
1,427

### I think if we measure antinodes it's half of a...

I think if we measure antinodes it's half of a full wavelength?
Look at pic?
10. ## Thread: PHYSICS Help ASAP

by SkyWind
Replies
8
Views
1,427

### Are you sure? The antinodes are the highest point...

Are you sure? The antinodes are the highest point of a wave right, if we were to measure from node to node, the points of no vibration then it'll be one lambda?
11. ## Thread: PHYSICS Help ASAP

by SkyWind
Replies
8
Views
1,427

### I think you mean 1/3 = time, 3 hz is freq. Ok,...

I think you mean 1/3 = time, 3 hz is freq. Ok, the wavelength is equal to ~0.79m. Since the distance isn't really one lambda, but lambda/2, so the distance travelled is ~0.390m. Yes, now I can use...
12. ## Thread: PHYSICS Help ASAP

by SkyWind
Replies
8
Views
1,427

### Hmm, I might be able to find the distance betwen...

Hmm, I might be able to find the distance betwen the two antinodes, it does say it goes from loud-soft-lound. So antinode-node-antinode, and antinode is where it peaks. But find the wavelength...
13. ## Thread: PHYSICS Help ASAP

by SkyWind
Replies
8
Views
1,427

### PHYSICS Help ASAP

Hey,

My question:

Two loudspeakers face each other, vibrate in phase, and produce identical 440Hz tones. A listener walks from one speaker toward the other at a constant speed and hears the...
14. ## Thread: Don't know where to Start!!

by SkyWind
Replies
3
Views
1,011

### Well, with much thought...I figure ok since the...

Well, with much thought...I figure ok since the mill has 16 blades/gaps, all equal, the theta or angle would be 2pie/16 or pie/8. Using theta=wt, I found the time to be 0.312s.

next, I just used...

by SkyWind
Replies
4
Views
1,395

Uni
16. ## Thread: Don't know where to Start!!

by SkyWind
Replies
3
Views
1,011

### Don't know where to Start!!

Hey, any ideas on this double starred, hard question :(

A golf ball passing trhough a windmill at a miniature golf course. The windmill has 8 blades and rotates at an angular speed of 1.25 rad/s...
17. ## Thread: Alright, PHYSICS time...

by SkyWind
Replies
4
Views
1,395

### Ok, I figured out what I did wrong. The quadratic...

Ok, I figured out what I did wrong. The quadratic eq for one thing I'm missing a b^2 in the top part. Ok, so now I get 7.0m/s and -4.0m/s. These answers makes more sense because if it is elastic then...
18. ## Thread: Alright, PHYSICS time...

by SkyWind
Replies
4
Views
1,395

### Alright, PHYSICS time...

Ok here's two problems that I have attempted to solve, and quite succesfully, but I need one you to check the work. Suggestions to anyone question is great and well appreciated.

1)A mine car,...
19. ## Thread: Physics again! really lost

by SkyWind
Replies
14
Views
2,309

### BTW, Thanks for the Help!

BTW, Thanks for the Help!
20. ## Thread: Physics again! really lost

by SkyWind
Replies
14
Views
2,309

### wow, that looks complicated lol. Ok, does this...

wow, that looks complicated lol.

Ok, does this way work?

uphill:-mgsin@-F+(E+1298N)
downhill: -mgsin-E+F

solve for E in bottom and sub into uphill equation.

E=-mgsin@+F
21. ## Thread: Physics again! really lost

by SkyWind
Replies
14
Views
2,309

### Slosh, help me lol, I'm out of ideas

Slosh, help me lol, I'm out of ideas
22. ## Thread: Physics again! really lost

by SkyWind
Replies
14
Views
2,309

### Ok is this way possible? Ok so let me see: ...

Ok is this way possible?
Ok so let me see:

P=FV

P(uphill)=mgsin@ +F(friction)
P(downhill)=mgsin@-F(friction)

ok so I subtract them:
23. ## Thread: Physics again! really lost

by SkyWind
Replies
14
Views
2,309

### why did you include 19000 in there might I ask? W...

why did you include 19000 in there might I ask? W acts in the vertical, how does that influence the horizontal forces?
24. ## Thread: Physics again! really lost

by SkyWind
Replies
14
Views
2,309

### ok so far so good. Ok so, I don't have F, E and @...

ok so far so good. Ok so, I don't have F, E and @ variables but I have mg which gives me N?

ok so F=E+X
F=mgsin@

so, mgsin@=E+1298. I can't solve for E, I don't have @.

Ok, so...
25. ## Thread: Physics again! really lost

by SkyWind
Replies
14
Views
2,309

### Well as far as understanding your diagram, I'm on...

Well as far as understanding your diagram, I'm on the mark. But as for your equations, I'm lost lol. But thanks for the help, I'm sure once I get my sleep/early morning coffee I'll be able to figure...
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