When I was designing a thrower, I had a mechanical problem with a high score solution

The range mentioned in this question is related to the two quantities.

1.The height of the throwing point h

2.Initial velocity v when throwing

You can set the height yourself.

The initial velocity v at the time of throwing can be found by using the law of conservation of energy, that is, the elastic potential energy of the spring is converted into the kinetic energy of the throwing object (e=1 2mv 2), and the formula for the elastic potential energy of the spring is:

e=1/2kx^2

k --- elastic stiffness coefficient.

x --- length of the spring.

Push back k, x---e---v

h - range.

The calculation method of the range l is that the horizontal velocity v multiplied by the landing time tt can be calculated according to the altitude (t = 2gh under the root number).

g= (constant) h

This calculation is indeed not easy, first of all, the upstairs practice, theoretically speaking, is not very perfect, first of all, there are two parts of the kinetic energy converted into the elastic potential energy of the spring, one is the kinetic energy of the throwing object, and the larger part is the kinetic energy of the rotation of the stick, and the kinetic energy of the rotation of the wooden stick can never be simply calculated with 1 2 mv 2, which is related to the moment of inertia and angular velocity of the stick.

In this process, the wooden stick, the object is obviously not in uniform circular motion, it is difficult to calculate the initial velocity of the object when it is thrown with a few simple formulas, and the resistance of this mechanism, I estimate that it is also quite large, will greatly affect the final result, I estimate that the conversion rate of elastic potential energy to kinetic energy is even less than 50%.

In this way, my suggestion is to reduce the mass of the system as much as possible, especially the mass of the throwing arm, and try to use lighter materials, so that we can ignore the kinetic energy of the throwing arm. For throwing objects, the mass is as large as possible. Minimize friction within the system.

Still, the error in the results of this calculation is significant.

The second floor is very well said. There's just a question of the projection angle. The projection angle is 45 degrees from the horizon, and theoretically the farthest range.

No, when the projection angle is different, the height of the projection is different, the potential energy is different, the muzzle velocity of the projection is different, and the starting height is different, and the starting position (front and rear) is also different, which is not so simple.

The mass of the rod is ignored, and I wonder if all the energy is converted to kinetic energy? "If you ignore it, it should be.

It's best to see the diagram, ** or schematic, because my imagination ability is poor, and I can't figure out what it is.

My nickname: Red Sun Rising.

I'll add you QQ

You went to school in the U.S., and I did that.

To use, force arm and torque. It is good to consider the angle of the shot, and the friction.

What are springs used for? Lack of power is not good!

Potato? It looks like it's heavy.

The foundation of this dropper is not necessarily able to withstand it yet.

You're amazing.

Admire, admire, admire.

It's too complicated, leave a name and think about it when you have time.

You're a Shmo School, and the school's philosophy is really good.

Leave a mark to communicate with you when I am free.

Disadvantages: First: Biochip technology is still only in the research and development stage, and has not been transformed into a commodity for mass use, because there are still many problems in this technology.

The main problem is that the cost is too high, and current biochip technology requires a range of expensive cutting-edge instruments such as lithography machines, oligonucleotide synthesizers, and laser confocal microscopes, such as a system at affymetrix13$50,000, which is a large expense for the average lab, is a major obstacle to the diffusion of biochip technology. In addition, the sample preparation and probe labeling methods for the target to be determined are complex and require specialized technicians to operate, which leads to relatively high research costs and cannot be popularized.

Second, there are different degrees of false positives and repeatability in the current chips, which may be related to the influence of target molecule concentration, probe concentration, sequence composition of both sides of hybridization, salt concentration and temperature on the kinetics of hybridization, so it is necessary to fully study the physicochemical properties of these substances and improve the specificity of the chip. Third, it is the standardization of chips, that is, how to unify and standardize the results made by different laboratories and different operators, especially for those genes with low expression levels and no obvious differences, and it is currently believed that these errors can be verified by traditional protein analysis techniques such as enzyme spectroscopy, two-dimensional electrophoresis, immunohistochemistry and other methods. Fourth, the genomics resource pool needs to be greatly enriched, and the sensitivity of signal detection needs to be increased.

The ultimate goal of chip development is to realize the integration of the entire analysis process from sample preparation, chemical reaction to detection, and form a miniature full analysis system to achieve automation. With the continuous development of new materials and technologies, the application field of biochips will inevitably continue to expand from laboratory research applications to clinical applications.

The biggest drawback is reliability. The result of these high-throughput techniques is that false positives are very high.

Detect that you have super genes, you say that I am a genius and do not need to work hard, but it turns out that it will be scrapped after n years.

The gene was detected to be ordinary, and there was a chance to succeed if you worked hard, but as a result, you said that the gene decided that there was no big future, and you gave up on yourself, and it was scrapped after n years.

1.To make the root number (x-2) meaningful in the range of real numbers, the range of values for x ( x 2 )

2.Knowing b 0, simplifying the root number negative (a 3) b results in (-a (-ab) ).

3.If 2 x 3, then root number (x-2) 2+|x-3|Can be reduced to ( x -5x+7 ).

4.If the root number (a-2) + the root number (b-8) = 0, then the result of simplifying the root number (a of b) is (1 2).

1.If it makes sense under the root number (x-2), then x-2 0, then, x 23（x-2）²+3-x

4.If the root number (a-2) + root number (b-8) is equal to 0, then a-2 and b-8 must be equal to 0, so a=2, b=8, and a of b is equal to a quarter.

It is possible that you press too much at once, remove a few, and there is a possibility that sp1 and sp2 are not installed, some plugins need these two things to support, if not, please leave an email, I will send it to you.

I haven't encountered this situation either, it's just speculation, if it's useless, please understand.

To add: LZ are you fs9 or fsx? Explain that the sinofsx forum is being repaired, you == it.

First, how can there be a good tutorial for 3DMAX?

Second, how to reset all the material balls.

Three, for example, if there are a bunch of things in an interior design, how do I take them out one by one and put them in other 3dmax?

Answer: In other models, select the thing you want, then select File in the menu, select Save Object As, and then put it in the 3DMax you want, just click File - Merge.

Select the ones you just saved and they're merged.

Note that the lower version max can be merged into the higher version, and the higher version cannot be merged into the lower version.

Hehe, I'm also engaged in design, what problems do you have to communicate together!!

It was a bit of a hassle to move from outdoor to indoor, and I was able to turn my head like a bucket back then.

If your friend is in a hurry to get the picture, you will definitely not have time to learn LS now.

The simplicity of vray is based on a lot of experience, and if you haven't used vray before, it's hard to make an effect.

You might as well use sl...

The renderings of the beauty salon must be clear and breathable, and it is best not to appear dead black (and the hospital too): all pictures with medical elements must be like this, and no one wants to make the picture look like a KB film.

It's best not to try to get the overall yellow effect of the sun outside the window, although it is dreamy and easy to get in the vray, but it is really not suitable for medical elements.

There's too much to say, and I'll 22760899 specific q

Rendering with vray online tutorials is simple but powerful.

If you really can't buy a book with a CD, it has models and textures.

Is there a problem with decoding when this ** itself is generated?,I've encountered it.,Convert this** to something else** (supported by Camtasia Studio 7) with format conversion software and you can import it. I'm not sure you'll succeed, but here's how I solved it.

My win10 system,N card installed on the computer,The tested solution is to enter the N card control panel - manage 3D settings - program settings,Set the Camtasia program to run on a highly integrated card (that is, run Camtasia without N card),You can try it,I'm OK when I use it。

I suggest you take a look at the basics, hehe.

3. At any moment of circular motion, the linear velocity direction of the point is perpendicular to the radius of the current center of the circle.