Exercise related math problem

[Jandy]

Okay. If a 200lb, 6ft man, does a pushup with his hands touching the ground at a 90 degree angle, how much force/resistance/weight is he actually pressing?

Here's a diagrahm (might be off I listed downward force as 200lbs, when its not actually 200lbs right there.... so disregard that)

EDIT: Forgot to add, the man has a 3ft arms length

 

[Scotsman]

Need to know how long the arms are. Might be on the pic but I can't enlarge it.

Cheers,
Scotsman

 

[Moderate_THIS]

pound isn't a unit of force, for starters. 2nd, this is retarded. 3rd, he would be pressing 891N sin (30°)

 

[BrothaBill]

pound isn't a unit of force, for starters. 2nd, this is retarded. 3rd, he would be pressing 891N sin (30°)

Yes, its quite a simple physics problem, the conundrum in your question is that only a person who knows physics would be able to solve it, but someone who knows physics this would be too elementary for him to answer it.

THat is your answer!! There are no answers without including the wrong answer, its all about Zen, Yin yang both right and wrong is the only correct way! Next question for BrothaBill!!

Greetings from beyond the Third Plateau. Well past Sigma plateau. I call it the omega plateau is where I ended up, now Im going in reverse with all the answers!! hahaha!

 

[hamstershaver]

9

 

[Becoming]

the arms are 3 ft long and the body is 6 ft to the shoulder? we need more accurate measurements....

 

[BrothaBill]

the arms are 3 ft long and the body is 6 ft to the shoulder? we need more accurate measurements....

All the information you need to give an answer is there! Just use what you got, its that simple. write the answer as an equation with the shoulder height left as a variable, that is the best answer you can give. Or look up the average physiological measurement of a human shoulder height in relation to a 6 foot man. But itd still be wrong b/c there is no truly accurate measurement so the best answer is the most vague answer you give. That is more inclusive than a specific answer.
That is your first lesson of Quantum physics. Its not up to the person asking the question to give you the correct information. The correct answer depends on the observer and how they interpret the question. Its that simple!

Next question for BrothaBill

 

[Moderate_THIS]

Michiu Kaku?

 

[BrothaBill]

According to this theory, before the Big Bang, our cosmos was actually a perfect ten-dimensional universe, a world where interdimensional travel was possible. However, this ten-dimensional universe "cracked" in two, creating two separate universes: a four- and a six- dimensional universe. The universe in which we live was born in that cosmic cataclysm. Our four-dimensional universe expanded explosively, while our twin six-dimensional universe contracted violently, until it shrank to almost infinitesimal size. This would explain the origin of the Big Bang. If correct, this theory demonstrates that the rapid expansion of the universe was just a rather minor aftershock of a much greater cataclysmic event, the cracking of space and time itself. The energy that drives the observed expansion of the universe is then found in the collapse of ten-dimensional space and time. According to this theory, the distant stars and galaxies are receding from us at astronomical speeds because of the original collapse of ten-dimensional space and time.

This theory predicts that our universe still has a dwarf twin, a companion universe that has curled up into a small six-dimensional ball that is too small to be observed.


Yes, a brilliant man, Im glad I created him and he instilled all his knowledge in me. That is the duality I speak of. He is both the creator as I am as are you. all the answers are within you. You are the creator and you created all of this in your mind. An interface between you and your senses. To that end you are talking to yourself right now! Do you see how simple that is. The secret to the universe is Dualism, so much more knowledge I can give you. How to create magentic fields is just as simple.

Next question for Brotha Bill

 

[Fonz]

pound isn't a unit of force, for starters. 2nd, this is retarded. 3rd, he would be pressing 891N sin (30°)

Not quite, far more complicated.

200 lbs = 0.454Kg = 90.8Kg * gravity(9.8/m per second squared) = 889.84 Newtons of Force downwards at the initial point of him just about to start the push up.

You then separate the triangle into vertical and horizontal components.

Triangle has a height of 3 feet, and a hypotenuse of 6 feet, so the base is:
Root of(36 - 9) = 5

Making one angle 90 degrees, the farthest one 33.56 degrees and the man-arm one ( 90 - 33.56 ) = 56.44 degrees

Using components, at initial vector start-up, his y-axis component would be:

889.84(Force downwards) - (Force deflected by his position)889.4cos(56.44)

Force(initial) = 889.4N - 491.7N = 397.7N Resultant Force down

Thats the force necessary to maintain his current position.

When he does the push up, all angles become zero, and F = 397.7 Newtons expended.

THEN, when he pushes up again, the Force is the same but negative(But we have to take the absolute value)

Therefore, total Net resultant force done by the man for one push up is 795.4 Newtons.

The x-axis is in the horizontal direction and is ignored always in these cases.
As the derrivative of any horizontal line = 0.