cars power to weight
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Q: In future could wireless power transmission be used to power moving electrical cars?
At present electric cars are powered by batteries, fuel cells or internal generators. This increases the weight of the car, batteries need to be recharged, it is difficult to store hydrogen to power a fuel cell and an internal generator is fuelled by fossil fuels. An electric car powered by a remote, but continuous power supply would be cheaper than a battery and negate the need for an expensive distribution fuelling system.
A: I believe it can be, but not as in radio broadcast, that would be rather hazadous to health at the energy levels needed, and wasteful as most would just enter the environment without being used at all.
As induction via inclusions in the road surface yes it is possible, sure a few technical issues, but nothing that can’t be overcome. The voltage issue with varying gap is no problem if the power is used to charge a small battery which drives the vehicle. Also means that not every road and every driveway needs to be energized.
And for a really low tech version look no further than the electric trolley buses and trams and electric trains that have been around for years. Now imagine sections of roadway, not all roads fitted with power options, whatever they be, and a modest battery in the vehicle, you charge your battry at home and wherever you park, but also on the powered sections of the roads, that way your range is pretty much limitless and weight and cost of your vehicle is kept low, and any safety aspects of powered sections of roads can be dealt with as only some sections need to be powered not all, and not every vehicle needs to use the power every time. So yes I can see it as a real option. (technology currently used by toll collectors on many toll roads, using radio transponders on your vehicle, can be used to bill every user for the power used). Nothing new or difficult, just expensive and requiring an innovative government or investor with deep pockets.
Q: Gravity car / weight powered car for physics eei?
hello! can anyone give me a sample hypothesis for this eei? also can anyone tell me how to make one?
and lastly, is this a good eei choice?
an eei is simply an experimental investigation in which the final results does not have to be scientifically accurate or proven but you know just an investigation
A: What’s an ‘eei’?…
Q: two cars have the same weight but one car has a bigger engine that provides twice the power of the other. Whic?
two cars have the same weight but one car has a bigger engine that provides twice the power of the other. Which car can make it to the top of a mountain pass first? which car does more work to reach the pass?
A: the car with engine having more power…..
well it also depend on driver of car …… 
Q: how do i make a mousetrap powered car carry weight?
i need to have a moustrap powered car that carries 500 grams and goes 1 meter. i made one, and it works great and goes really far, until i add the weight, and then it wont move. does anyone have any ideas what i could do to make it carry the weight? please help, it’s due on tuesday!
A: I assume that the mousetrap arm pulls a string, which is wrapped around an axle on the car. The trick is to get the energy stored in the spring to go into kinetic energy of the whole system. _IF_ the car were frictionless (yet tires still rolled — not slipped — on the road), it wouldn’t matter whether the energy were all dumped in at once, or if the energy were parceled out over the entire travel distance.
Here are a couple of things to look at:
1) Make sure your axles are very straight, and don’t require the car to raise or lower during its travel. It could be possible that the 500 grams can’t be raised (by some deformations in the axles), and the spring can’t start the thing moving.
2) Make sure the axles are as frictionless as possible.
3) The static friction might be too much to overcome at first. You might need to make the point where the string wraps around the axle a bit larger in diameter. This means that there will be a larger torque exerted on the drive axle, and the spring might be able to overcome that friction. It will mean that the car will accelerate more slowly, but it’ll have more power.
4) shorten the attachment point of the string on the mousetrap arm. It will be able to exert much more torque on the axle this way, but will pull for much less distance.
Q: How do you make a fish weight powered car that will go 8 meters? Answer this to get a Drury Dollar.?
Any student in either honors physics or regular physics that answers this question will get a Drury Dollar.
A: make a pulley system (emphasis on system, it will get it farther) from certain height. As the mass fall, it will propel the car forward.
It’s one possible design.
Q: What’s more important to a car’s speed, weight or power?
My brother in law have been arguing over who has the faster car. I have an ‘02 Pontiac Bonneville, his is an ‘03 Sunfire. I say he’d be faster since his car is nearly a thousand pounds lighter than mine, and a fair bit smaller. He maintains that my car would be faster because my 6 cylinder has more horsepower than his 4 cylinder. Short of taking our cars out to the track, we’re deadlocked on this.
A: The car with more power would be more capable of a higher top speed (in most cases).
Q: calculating the power of a car?
a car weight 250kg and and travels to a maximum velocity of 20km/h in 20 seconds.
if you know the solutions please provide us with the formulas needed to find the power in hp.
A: ACCORDING TO THE DATA YOU HAVE PROVIDED WE CAN USE THE FORMULA:-
POWER=(MASS*VELOCITY)/TIME
-where mass should be in kg,velocity in m/s and time in sec.
so a velocity of 20kmph is 5.55metres per second..(20 * 5/18)to
convert kmph to m/s just multiply the speed by 5/18…
therefore POWER=(250 * 5.55)/20=69.375 HORSEPOWER
Q: How much power could a car covered in solar panels generate?
How much power could be generated & how much energy could be stored by a car covered with Solar panels both at today’s current efficency rates (~15% I believe) as well as some theroetical rates for 10 years from now as the efficency of S. panels improve.
On a light weight car would it be enough to travel? If so for how long?
A: It depends on how big the car is, but in general the answer ends up being “not much”. There’s about one kilowatt, a bit more than a horsepower, per square meter of sunlight in good sunny conditions with the sun close to directly overhead. Current common solar cells have a conversion rate of about 15%, as you said. So, if a car is two meters wide, and three meters long, this will get you 600 watts, about 8/10ths of a horsepower, under ideal conditions. These conditions are that the sky is clear and the sun is close to directly overhead, and so on.
As far as how advanced solar cells will change this, the best available now are around 35% efficient. These are intended for space use where every little bit of weight savings counts, and are much, much more expensive than conventional solar cells. Use of these would get you over 1.5 horsepower under ideal conditions. The maximum, assuming hypothetical 100% efficient solar cells, something we have no idea how to make currently, and which will probably never be possible, would, like I said, be about 1kW per square meter of car space, again assuming ideal conditions.
It is possible to make a solar powered car that is fully driveable and can cover a good distance, but it’s going to have to be very lightweight, very aerodynamic, and have an extremely low rolling resistance if it’s to have anything resembling reasonable acceleration and top speed.
Q: Two cars have the same weight, but one of the cars has an engine that provides twice the power of the other…?
Which car can make it to the top a mountain pass first?
Which car does more work to reach the pass?
A: you can not tell unless we know which one has the bigger petrol/ fuel tank other wise if they had the sam then the faster one would waste fuel faster and run out
but if it’s a short distance then its pretty obvious that the double powered car will go faster
sorry if ia am wrong
Q: Weight powered car axel won’t unwind?
So I’m making a weight powered car for physics. The requirements are the drop height is 1 foot and the falling mass is 1 lb (i only have 0.5 weight at home). When I tug on the string to test the front rolling axel by itself, it rolls just fine, but when I hook it up the the metal paperclip-not pulley thing the mass just refuses to fall.
what’s wrong with this car?
A: Could be the axle diameter is too small. Mechanical advantage is axle diameter divided by tire diameter. String tension times mechanical advantage must be greater than the friction. So reduce the friction and/or increase the axle diameter. Try wrapping tape around the axle before winding up the string.
Q: Whats the best way to power a rubber band car?
I know that i can use a propeller or power the wheels, but i was wondering which would get the car the furthest, no time requirements or weight. The cars are being run on a smooth flat surface, assumed to be level. Thanks.
A: internal combustion engine.
Q: How do I make a light weight mouse-trap powered car?
I am doing a physics experiment, and I need to make a mouse-trap powered car by Monday. I have searched all over Google and have not found an efficient way of making one without buying a kit. My grade is depended on whether i enter the speed contest or the distance. The car is required to reach at least 2 meters. I may only use a standard mousetrap, and manufactured wheels and axles are not allowed. No manufactured parts are allowed what so ever. What do i need, and how do i put it together so it will work?
A: All you need to do is attach wheels and axils to the mouse trap, and then transfer the power from the spring in the mouse trap to the drive shaft of the wheels.
You are most likely going to want to design some sort of pulley or gear system to transfer the power as the spring is far too strong to transfer the movement one to one. The easiest thing I can think of is to attach string to part of the trap that snaps down on the mouse, and wrap the other end around the axil of one of the pairs of wheels. It should be crude, but effective.
Q: im 19 got 2000 i want a nice hatchback car with good power to weight ?
i been in my mates zetec s and i really like it, but is there any other cars just like that ? that will last long that has good reliablity and good mpg and also a bit of performance since im going to be doing motorway trips to my new job? somethink exactly like a fiesta zetec s 2000 that handles nicely also and has power in every gear thanks for your time, and also i aint a boy racer i just love cars to much to even hurt it
A: At you age do you also have the £3500 plus or the income to be able to afford to insure something other than a 1.0 litre Corsa or similar. Check the insurance price before you commit to buy as even one of those will start at £2000 a year for you and will likely be lots more.
Q: What race cars have power steering, and which ones don’t?
i was having a conversation with one of my classmates about the use of powersteering on race cars today. I think that the gyroscopic effect of car wheels would make it an absolute nessestiy at the speeds seen in ChampCar, Indy, Nascar, ect. but on the other hand they would add weight and one more element to go wrong?-experts? (Nascar, Champ, Indy, LeMans, anything larger than a shifterkart)-thanks
A: No power steering I run super stock on a quarter mile oval track and if you ever drove a car with no power steering then you would know that the faster you drive the easier it is to steer. I don’t know what the pros are running but thats the consciousness at the track no body runs power steering because as you previously stated its just no more thing to break
Q: What is the torque requirement on a dc motor to power a toy car?
Specifically, is there an equation that can relate torque (t) required for a dc motor to power a toy car with total weight (c), two wheels each weighing (w) with radius (r), gear friction (g), surface friction (s) between the wheels and the surface, at a velocity (v)?
A: It should be acceleration (a) and not velocity. Draw a freebody diagram and write one yourself. I’ll make comments on your attempt.
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