Recent content by ForecasterJason
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Undergrad Calculating actual weight lifted on a pulley weight machine
Sorry, I think it's just that I have a hard time with physics. I attempted an engineering physics class in college and ended up dropping it. I think I have enough of an understanding to figure out exactly how much weight is being lifted by the person. I did some more reading and it looks like I...- ForecasterJason
- Post #13
- Forum: Mechanics
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Undergrad Calculating actual weight lifted on a pulley weight machine
Ok. So is it correct to say that if the manual specifies 215 lbs of resistance to move 90 lbs, that assumes a fixed distance (like lifting the weights 1 foot)? And if the weights are lifted (for example) 10 inches, it could be something like 200 lbs of resistance? And if 15 inches, closer to 240...- ForecasterJason
- Post #11
- Forum: Mechanics
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Undergrad Calculating actual weight lifted on a pulley weight machine
Ok. When it comes to the length of the bar, yes, I misread that previous statement. Now I'm clear on that. Thanks for looking into the other part.- ForecasterJason
- Post #9
- Forum: Mechanics
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Undergrad Calculating actual weight lifted on a pulley weight machine
Thanks for the explanation; I think I got it. So, it's really all about the length of the rope in relation to where the pivot point is located. That answers the question of the differences in weight resistance between exercises. Now with my other question of how much weight is actually being...- ForecasterJason
- Post #7
- Forum: Mechanics
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Undergrad Calculating actual weight lifted on a pulley weight machine
I don't think so then.- ForecasterJason
- Post #5
- Forum: Mechanics
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Undergrad Calculating actual weight lifted on a pulley weight machine
When it comes to the differences between the chest and leg press, that would make sense then. If I understand what you mean, the leg press is pushed farther away from the weights than the chest press.- ForecasterJason
- Post #3
- Forum: Mechanics
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Undergrad Calculating actual weight lifted on a pulley weight machine
Hi, I have a pin-loaded pulley weight home gym machine. There are 9 weight plates that are 10 lbs each, so for each exercise the maximum weight that can be done is 90 lbs. However, there is a chart in the manual that shows the weight resistance for various exercises based on how many plates are...- ForecasterJason
- Thread
- Machine Pulley Weight
- Replies: 14
- Forum: Mechanics
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High School Effects of wind on a moving person
Ok. Did you mean "hair" in your second sentence?- ForecasterJason
- Post #34
- Forum: Mechanics
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High School Effects of wind on a moving person
Ok thanks. So, it sounds like then the speed as well with which it would be blown would be accurate from what I was saying.- ForecasterJason
- Post #32
- Forum: Mechanics
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High School Effects of wind on a moving person
Bumping to see if anyone can provide insight.- ForecasterJason
- Post #30
- Forum: Mechanics
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High School Effects of wind on a moving person
So, something I've been thinking about lately is the effect of wind on long hair while someone is running. Since long hair will often bounce around up and down and side to side, is it predictable what the effects would be with a strong wind? Or would this be too complicated? For example...- ForecasterJason
- Post #28
- Forum: Mechanics
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High School Effects of wind on a moving person
Thanks everyone. The apparent wind was what I meant by cross winds, and I found out how to calculate the speed for that.- ForecasterJason
- Post #6
- Forum: Mechanics
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High School Effects of wind on a moving person
Hi, I am curious as to the effects of wind on a moving person. If a person is walking at 4 mph and they encounter a 10 mph headwind, would the person feel the wind about the same as if he/she is standing still and is facing a 14 mph headwind? Likewise, if a person is running at 7 mph and...- ForecasterJason
- Thread
- Effects Wind
- Replies: 34
- Forum: Mechanics