What materials would you choose for the bumper of your passenger car? What are the criterias you must consider
102116
Something that will take the damage instead of passing it on to the car.  If it is too strong, and the car is hit, the damage will be passed on to the vehicle.  You want something that will bend/break.  They used to make them of hard metals, but now they make them of more plastic-like materials.
1096740
go to a junk yard and get some fake wood \nfrom another car\nit will fit and work best\nor ask at your local harware store or car guy
480270
Car metal dents easily because it is designed to absorb collision energy.  The more it deforms, the more the impact is disappated- protecting the occupants inside.
721417
You could try the following links:\n\nhttp://www.emachineshop.com/material-plastic/acrylic.htm\n\nhttp://en.wikipedia.org/wiki/Acrylic\n\n\n\nI hope the links helped you with your question.
662478
If you got one of those cheesy japanese cars (honda, toyota...) not very big - like the size of a pea.  A hearty American car can withstand much more abuse. \n\nCheers!
1186263
Mechanical considerations, see reference
1180080
A car's frame is made of metal.  If lightning strikes the car, the metal will conduct around you through the metal because metal is a better conductor than your body is.  Unsafe is electricity going through you.  Do not stand upright in a storm or even under a tree.  Also don't lay flat on the ground because if lightening strikes near you, the conduction through the ground may offer more resistence than your body and the electricity may take a shortcut through your body.  Best thing without a car is to squat down.
432238
Mass, acceleration, velocity, wheel size, traction (tire surface contact to track), torque from engine, horsepower. Are some of the things needed to know.\n\nYour best bet is start with a kit for a given class of race car and build and learn from that. Start with a Go-Kart.
1118371
double_nubbins has the right approach.  I will add a couple of hints: how long will it take the car to fall 19ft (remember the acceleration equation s=.5*g*t^2).  Assuming there is no air drag, the horizontal velocity of the car must be enough to cover the 52m width in that time.\n\nSpeed of the car? The horizontal speed? The falling speed?  The speed in the direction of motion?\n\nHorizontal speed: as calculated above\nFalling speed = g*t, where t is the time calculated above.\nSpeed  in the direction of motion = sqrt(horiz speed ^2 = falling speed ^2)
824011
As a previous answer stated, different woods (and even different pieces of the same type of wood) have different densities and thus different weights and may affect speed accordingly.  But if your underlying question is about the impact of materials on speed, your selection of wood is minimal compared to other factors.  Since there is a maximum weight allowed for cars your choice of wood would not materially affect your car's speed as much as just buying the regular pinewood kit and using lead stick-on weights to reach the maximum weight (which would also give you the flexibility to place the weight where you wanted it - front, back, center, etc.).  \n\nOne factor that has a far greater impact on overall performance is making sure the axles are square to the body of your car, because, to paraphrase Jonnie Cochran, if your wheels ain't square, you ain't going nowhere.  If your axles are perfectly square to the car body your wheels will turn smoothly and not slow your car down by jumping up and down or wiggling back and forth across your lane.\n\nAnother important facter is the "freeness of spin" of your wheels.  You can sand the axles and use graphite power for reduced friction.  \n\nI'm not sure if this is exactly what you're looking for, but in the grand scheme of things, wood type does not have a great impact on car speed.
500406
good in bed and personality comes high up on my list.\n\n'good' is in the eye of the beholder. what you think is best of monster trucks or bentleys doesn't really matter. in the end of the day its how you enjoy the ride that matters. \n\na dented and scratched car will most likely get less looks than a nice coloured, new wheels, nice details and clean car. or perhaps you prefer motor cycles. point is, boys have different taste in women as with cars. some men love big girls and dont want any skinny ones, whereas others prefer skinny girls. personally i would believe most girls were somewhere in between and i look at the whole person. i have super pretty girls (big/skinny) who were very boring and vice versa. sorry i'm rambling here, but i hope you get my drift.\n\ni would choose the little overweight with a beautiful face.
105033
steel is used most often. Chevy trucks have a hydroformed steel frame that's stronger. some car have aluminum but it's rare and some high performance cars have different material but are expensive and rare
339438
to run into with your body or your vehicle
943056
search polycarbonate+physical properties\ngood luck
1139330
Hi\nThe most damping rubber material I know is acrylate caoutchouc. It is also temperatur resistant up to 130°C. CR (chlorine butadiene caoutchouc) is also pretty good in damping. An alternative material is PU foam. The right material for you depends on the application.
366793
lots of materials' properties can be found. you can try this link..
943816
i want to make a system that gets mounter to the passenger front bumber of my car, so when im stuck in traffic and some _hole feel he deserves to drive in the emergency lane, the laser will burst a hole in his tire, and give him a reason to be in the emergency lane.  Some issues with this system is the timing of when to fire the laser, how much power the laser would be.  You dont want to accidentally fire at the wrong thing, so these issues must be addressed first.  I think thats pretty innovative.\n\nwhilst working on my M.E. senior design project, my sponsor (an artist) wanted to make a dynamic hologram depicting a full COLOR rainbow..  Yeah, I know...  It made for great jokes the entire year.