### Redirecting a mechanical force? Answered

Hi, im looking for some help with a physics/engineering type problem. Im looking for the most effective method of tranfering a mechanical force from one direction to another. For example if i had a 1" horizontal rod struck on its east face which then begins to travel westward on a fixed horizontal track, im looking for a method of transfering the energy (not sure if thats the right word) in the opposite direction. A few important factors are that the rod which is struck does need to travel around 4 inches on the fixed rail, and any vertical movement needs to be kept to a minimum. Below is one of my early ideas, serves little pupose as the mechinism is too large but gives you the jist of what im talking about.

Asked by Squibo 8 years ago  |  last reply 8 years ago

### Measure Punch Force tool

Hi All, I do understand we all keep creating new electrnoic tools/gadgets everday. But anyone had tried to create a tool which can measure force / intensity of human punch. It is fun to measure your punch force among friends. also if help us to improve your boxing strength. Please share your thoughts on it. Thanks

Posted by VinitV 1 year ago

### Calculate magnet repulsive force?

I'm looking to make a "floating" model by insetting NdFeB rare-earth magnets with same poles facing so they repel. Now, magnet selling places specify the "pull" a magnet might have, say 1.2kg. What I would like to know is if the repel is equal in magnitude as the pull if two similar magnets are placed with same poles facing, is the force exerted 1.2kg and so I could float 1.2kg of stuff? Also, does stacking magnets double the attractive or repelling force, i.e. do two 1.2kg magnets stuck together lift 2.4kg of stuff, negating the small difference in distance of one magnet from the object? Is there a way to calculate the distance between two opposing magnets with a force applied. Does it follow the inverse cube rule? And if the stacking does work, do I also need an equal number of magnets on the other side for repelling, i.e. a stack of two 1.2kg magnets repels 2.4kg with one 1.2kg on the other side, or not? Does the magnet on the other side have to be the same force? Lots of questions but hoping someone can shed some light on this as I've not been able to find anything about it :-(

Posted by chiok 9 years ago  |  last reply 3 years ago

I think it's pretty sad if you can suddenly not look at secondary pictures, or some pages of an instructable, without being logged in, if this pathetic behaviour continues I will have to un-register and stop visiting.

Posted by Whatnot 9 years ago  |  last reply 7 years ago

### Force an automatic transmission into a gear?

Is it possible in the technological day and age to force a computer controlled automatic transmission to start in a higher gear like second.  About 90% of people will never need this, however out on the farm in a big diesel truck with 800lbs of torque you need it.  By starting in a higher gear it allows us to get through snow much better and this becomes extremely difficult with an automatic transmission.  Sure we can set the highest gear it will go into, but we can't lug through the snow and mud like we would like to.  Do any of you know of a chip out there already, or one you can make that will let you pick and chose your lowest gear.

Asked by jj.inc 5 years ago  |  last reply 5 years ago

### how to calculate force required to lift a 40 kg mass?

i want to throw a 30-40 kg opponent robot in a robowar in air! i wanna lainch it in air, that is the attack strtegy am using...please help me to find th e force required to do that. thanks in advance!

Asked by sarathjulius 9 years ago  |  last reply 9 years ago

### Torque to linear thrust through lead screw

Hi,I am trying to figure out maximum linear force I can produce with an electric motor through use of lead screw and nut. I have come up with an equation which seems correct but resulting forces are way higher than my intuition believes is correct.I tackled the problem from the perspective of energies:F' * p = M/r * 2*π*rlinear force * thread pitch = torque / radius [M/r = force at radius] * circumference of lead screwF = 2*π*M/p * (1-k) //k stands for coefficient of friction between lead screw and nut)Radius falls out of equation, which seems fine as force is provided by torque, which is radius agnostic. I used a 7€ stepper for source of torque which can provide 0.42 Nm of torque and a lead screw with 8 mm pitch and 4 mm radius, I assumed 15% losses. My equation tells me that such system can provide 280 N of force, which seems wayyy too much for a cheap motor.I have attached a python code that calculates linear force in case it helpsCan someone tell me if my equation is either correct or flawed?

Posted by ptkrf 3 months ago  |  last reply 3 months ago

### hot glue in a dishwasher?? Answered

I am repairing broken locking mechanism in the door of a dishwasher. Of course there will be a bit of force involved when pressing the handle and the dishwasher will heat the water which can melt the glue. What's your opinion? Should i use it??

Asked by Karletto555 8 years ago  |  last reply 8 years ago

### Knex Gun Force Standard

The problem is that almost no one has enough room inside to shoot a knex gun unless it's a total peice of ....you get the point. But, by going outside there are many other vaiables that effect how far a gun can shoot (eg. Wind direction/ speed, trees and other obstruction, etc.) Also power as in "can shoot through can" or "through 3 sheets of hard cardboard" can also be misconstrude in the way that range from the can is a main factor, point blank range is not always the most powerful range, often 1-3 inches away has exponentially higher power. What needs to happen is a tool be built (out of K'nex, what else?) that is not only easy to use but impossible to mess up, it should be able to give 100% accurate reading for all types of guns from the weakest to the most powerful. Also in terms of different types of ammo, rod size shouldn't matter( thats what she said) the only thing that should matter in terms of ammo is whether it is deer slug, rod, sligshot/ catapult rod(a rod with something the can grab the elastic), or other and specify what that is.Range is all to often streched beyond reality by saying it can shoot 200 yards, when really it might be able to shoot 50 yards tops when pointed strait but 200 yards if it is pointed strait at the sky. We need to bulid a target that you shoot from maybe 5 feet away and something mesures force, be it cardboard, or cans, or plywood, maybe even something that leaves a dent in it and you can mesure the depth of the dent to tell you how much force (eg. 1/2"=1, 1"=2, 1 1/2"=3, etc.)Also one last idea if you would prefer to stick to range outside, is that you divide the range in feet, by the number of cardboard sheets(or other medium)the gun can shoot trough at point blank range (say it shoots 63 feet, and through 4 sheets of thick, corrugated cardboard the equation would be F= 63/4= 15.75, so your force rating would be 15.75)These are only some ideas to get all of you thinking about a standard in K'nex gun power.-TheXenk

Posted by TheXenk 10 years ago  |  last reply 10 years ago

### Anyone Have experience with Adafruit Square FSR?

I am hoping to create a circuit that will variably control the speed of a motor through pressure. If I were to wire up one of these http://www.adafruit.com/products/1075 , simply as the switch between a small motor and a power source around 5v, would it work to simply turn the motor off at rest and vary the speed with pressure? Is there a way to use this resistor as a "switch" without using an Arduino or  other micro controller? Any help is appreciated. Thanks!

Posted by Flashflint 4 years ago  |  last reply 4 years ago

### what forces are used in a mousetrap car?

Asked by projectsforalina 9 years ago  |  last reply 7 years ago

### Missing Episode of Spy-force?

Hello :D i am trying to find a episode of the television series Spy-force- Episode 41 ( i think), named "the trail" (or something similar) if anyone knows where i can find this or can give me a link,etc, please post thanks AAG

Asked by AussieAnglerGal 6 years ago  |  last reply 6 years ago

### My girlfriend's father will do anything to keep me away from her. What do I do? Answered

He even resulted to physical force. She is really mad about it but i don't know what i should do. i am never bad, i think i set a good stage for myself, i behave and all around him, but it's getting on my nerves.

Asked by PyroMaster007 9 years ago  |  last reply 8 years ago

### My chemistry textbook was right all along!

As reported in Physics World today, a team of Swiss and Dutch physicists have developed a novel tip for an atomic force microscope (AFM) using a single carbon monoxide molecule. The tip is stable enough to image individual atoms and bonds within molecules.The first image below is from the group's AFM of a single pentacene (C22H14) molecule on a copper (Cu(111)) substrate. The second picture shows the conventional chemical structure diagram (the vertices are carbon, and one hydrogen hangs off of each exterior corner), and the third is a "ball" model, with carbon atoms in black and hydrogen in white. As discussed in the article, the whole molecule is just 1.4 nm long, with a spacing of 0.14 nm between adjacent carbon atoms.The paper is out in today's Science, but it's pay-per-view.

Posted by kelseymh 9 years ago  |  last reply 8 years ago

### I sense... a disturbance in the Force...

Oh yeah. Bill Gates didn't go to work today.He doesn't work for Microsoft anymore....Even if you're not a Microsoft fan, you have to admit, without Mr. Gates, where would the computer industry be? Where would we be?Flash back time:Ah, yes, I remember my very first personal computer... It was a Hewlett-Packard (not an "hp" ;-) with a MONSTER-sized monitor that took up a good 3/4 of my desk, a clunky keyboard and a "ball" mouse. It was running the latest OS: Windows 95. And get this: we were the first people on our street to get this new thing called the "World Wide Web" - whatever that meant. Our Service Provider? MSN, of course! Man, with my new computer (okay, in truth, it was a hand-me-down from Dad), I was the coolest 6-year-old in kindergarten. I had it made.Yeah, MS has made a a few mistakes...*cough*Vista*cough* (doesn't that go without being said?), but Gates and his company really did shift the industry into gear, and they aren't stopping any time soon.So, gentlemen, I ask you to join me as I tip my hat to Mr. Gates. Without him, I don't know who I would be.

Posted by Labot2001 10 years ago  |  last reply 10 years ago

### kenpachis force

Hey its about time i post some thing and since i got a ss coaster i figured id try it out the station is almost done and all i need is a curve part to it (pics will be up around 4)

Posted by knexsuperbuilderfreak 9 years ago  |  last reply 9 years ago

### FSR - Conductive foam readings

Hello! I am making a prototype of a force sensitive resistor, and i am using, to old 97%kobber coins, metal sheet and a tiny piece of conductive foam that i got from a tv-repair shop. The setup is not very good, but its a start, and i am planning the next move for better results... Now... I want some decent understanding of how the readings work, and why I get these results.. First test, are written with black, and and as you can see it, has the same amount of space between 0-1kg and 1-2kg, but 2-3 and 3-4 changes to a very small space? Why is that? Second question is, that i have used the x10, to read larger forces. 0-2,5kg and 2,5-5kg has same amount of space. Will the space decrease too, when getting further up the scale too?  - I know the conductive foam has its limits too, but just to be clear of my readings. Thanks in advance! I hope you can see the readings on the picture..!

Posted by L33boy 3 years ago  |  last reply 3 years ago

### i want to build a "force lightning" glove.

I would like to build a "force lightning" glove. Purely for show, no arcing over great distances, not looking to "throw" the lightning, just have it crackle around the hand and between the fingers. Any suggestions where to start would be greatly appreciated.

Asked by seabeejojo 7 years ago  |  last reply 8 months ago

### How to make an inexpensive Atomic Force Microscope? Answered

I am sorry for my very difficult question. I would like to make an inexpensive Atomic Force Microscope. Can you help me? Thanks.

Asked by VPA 9 years ago  |  last reply 3 years ago

### What is magnetic force and how does it work? Answered

There are a lot of people out there that find magnetism fascinating but have no clue what it is and how it really works and I'm one of them!

Asked by jakemaur 8 years ago  |  last reply 8 years ago

### How can PSI be converted to a recognizable or commonly used force? Answered

Null

Asked by PKTraceur 9 years ago  |  last reply 9 years ago

### "Knex War?" (The Math Bit)

Posted by Sharir1701 3 years ago  |  last reply 3 years ago

### How can you measure the force a human exerts from a limb such as a arm or leg?

Asked by PKTraceur 9 years ago  |  last reply 9 years ago

I've been playing a lot of Call of Duty, but I'm kind of irritated that there's nothing about Canada in it. Does anyone know of a video game where you play as Canadian forces?

Asked by Bartboy 8 years ago  |  last reply 2 years ago

### What is this tool?

Today, I had a clear out of the workshop (Okay, shed) and found this peculiar tool. It's being lingering around for years now, and I've never been able to figure out exactly what it is and where it came from. The orange thing pushes down and locks, and when it is at the bottom a tiny metal rod appears and dissapears again at the end of the white nozzle. It holds in place until you press the orange button, at which point it fires the orange thing out at a fairly high speed, and it stops when it reaches the end of the blue channel. If you cover over the nozzle, it fires very slowly, so it probably sucks air from there. Does anybody know what this tool is?

Asked by Ikkalebob 6 years ago  |  last reply 6 years ago

### Feel a magnetic force?

I was just wondering is it possible to fell a magnetic force on your skin and if so how?

Asked by Dominator57 7 years ago  |  last reply 7 years ago

### Principles of aerodynamics

The forces and counter forces of flight

Posted by SoDDiggerCpl 11 years ago  |  last reply 11 years ago

### How do you force a flower bulb to bloom in the winter?

What kind of bulbs can be forced? Can they be forced in water, or does the bulb need soil?

Asked by porcupinemamma 9 years ago  |  last reply 9 years ago

### knex game enhancer for the force unleashed.

This is a knex light saber I made for the up coming game the force unleashed for wii.

Posted by the_burrito_master 10 years ago  |  last reply 8 years ago

### electronic magnet that produces enough force to lift weight

you have an unlimited power source. now is it possible to create enough force at the right "degree" that would be repelled by the earth instead of attracted.. so like a floating magnet. but its strong enough to lift large objects..... like maybe a human?

Asked by fireball9919 7 years ago  |  last reply 7 years ago

### what happens when an unstoppable force meets an immovable object? theoretically? Answered

What happens when an unstoppable force meets an immovable object? theoretically?

### What was the force that made the fan car move?

Asked by samantha.frankli1213 1 year ago  |  last reply 1 year ago

### Science trumps the Force to create a real-life lightsaber?

Can anyone explain what is happening here! http://news.cnet.com/8301-17938_105-57604823-1/science-trumps-the-force-to-create-a-real-life-lightsaber/

Asked by artworker 5 years ago  |  last reply 5 years ago

### how would you measure the force that something exerts?

Asked by kazpro 7 years ago  |  last reply 5 years ago

### How do I calculate total lateral forces in the tyres of a 3 wheeler?

Are the lateral forces and lateral slip angles same for rear wheels and front wheel in a front (one wheel) steered rear drive vehicle?

Asked by SachinK114 1 year ago  |  last reply 1 year ago

### Who thinks Paper Force is a good Rockband name? (for wii)? Answered

Asked by mberg 8 years ago  |  last reply 8 years ago

### Is there an equation to figure a set amount of PSI to a recognizable, or commonly used force measurement?

What is/is there an equation to figure the speed a projectile travels, based on the PSI or force applied? What would this force be? k/h | fps | m/h | m/min. | k/min.|

Asked by PKTraceur 9 years ago  |  last reply 9 years ago

### how to build a G- Force measurer?

I recently seen on Tv where you built one of these and measured G-force on a rollercoaster ....got the end of it and don't what it was called. on diract Tv sat the 28th march 2009.

Asked by flintglass 9 years ago  |  last reply 9 years ago

### What is/is there an equation to figure the speed a projectile travels, based on the PSI or force applied?

Asked by PKTraceur 9 years ago  |  last reply 9 years ago

### how do i make a ben 10 alien force costume?

I need help making a ben 10 alien force costume got any idieas i just need help on the jacket

Asked by ashmane 9 years ago  |  last reply 9 years ago

### how to find t pin and ground on headset of force trainer toy? Answered

I can not find t pin and ground on head set board of force trainer toy,can somebody help me?

Asked by milomir 2 years ago  |  last reply 2 years ago

### Is the Elite Force 1911 airsoft gun Hi Capa/Tokyo Marui Compatible?

I want to upgrade my Elite Force 1911 into a modern race gun, and I wanted to know if TM upgrade parts such as rail mounts and grips can fit on it. Thanks!

Asked by zack attack 6 years ago  |  last reply 6 years ago

### Why Do planets Move ? Which force keep them moving in thier orbits? Answered

Why Do planets Move ? Which force keep them moving in thier orbits? google says..... because of the gravitational pull of the sun....... but isn't it the force which only keeps the planets in their  orbits......... ? is it also the same gravitational pull of the sun which keeps them moving ? if so , then how ?

Asked by _Boltz_ 2 years ago  |  last reply 2 years ago

### Centrifuge forces

Does anyone understand the different RPMs in centrifuges that will separate liquids from solids, such as Sea Salt out of Sea Water?

Posted by SeaCub 8 years ago  |  last reply 8 years ago

### Is there a way to change the value of a variable and keep it afterwards? Arduino Answered

Hello everyone, I don't really know if this is possible, I am using processing, arduino and a force sensitive resistor to control a servo and I want to change the value of a variable and then if I reset the arduino, it will kept the new value. Is there anyway to do this? This is the part of my code I want to change. void fsrMovement(){         int maxforce= 1023;  // THIS IS THE VARIABLE         if(Serial.available()){  // SERIAL AVAILABLE TO USE WITH PROCESSING         maxforce = Serial.read();         }         force = analogRead(FSR);  // Reads the FSR               Serial.print("Force sensor reading = ");         Serial.println(force); // This will print the raw force value         int pos = map(force, 0, maxforce, 0, 175); // Scales the force reading to degrees for servo control         Serial.print("servomotor degrees = ");         Serial.println(pos); // This will print the adjusted servo reading (an angle)         myservo1.write(pos); // Write the new angle to the servo         delay(10); // Delay 10 milliseconds before taking another reading

Asked by rojascan 2 years ago  |  last reply 2 years ago

### Compute the force required punch a 1.25-inch diameter hole through a 1/2 inch boilerplate. The shear stress is 42000 psi

Asked by Baseball24_7 8 years ago  |  last reply 8 years ago

### How do I force my dogs to have babies?

I just want puppies man....

Asked by Joe_gibbons 4 years ago  |  last reply 4 years ago

### Does anyone know how i can connect a FSR force sensor to a digital alarm clock ?

I would like to trigger the alarm when it is under 80 ohm (Maybe).  about the FSR force sensor -- > http://www.ladyada.net/learn/sensors/fsr.html

Asked by aliibaba 7 years ago  |  last reply 7 years ago

### How can I know knowledge about the force

I mean how to use my hands for picking and lifting object

Asked by atta boakye 9 years ago  |  last reply 9 years ago

### Can you fix a laptop with a 64-bit OP after a force shutdown without the Windows 7 installation disk?

My laptop is a VPCEE3WFX  Sony vaio that I have abused with a few force shutdowns. Now it won't show the password enter box. I looked at a few forums and they suggested that the only way to fix this is to insert the installation disk and boost it up. The problem is that I don't have the disk.Is there any way to do it without the disk?

Asked by i_am_a_felt_unicorn 7 years ago  |  last reply 7 years ago