Cars Definition and 435 Threads

Katie, who is traveling southward in her bumper car, aims her car toward Sam, who is traveling northward in his bumper car. The cars collide and briefly come to a stop. What is the direction of the force exerted on Katie's car during the collision? What can you say about the...

Like every year, this is the season for the Shell Eco-Marathon annual fuel-economy competition. Last week, the hydrogen-powered Swiss PAC-Car II broke a new record, using 1.02 gram of hydrogen to finish the race. This is the equivalent of 5,385 kilometers per liter of gasoline. For users of...

http://www.eurekalert.org/pub_releases/2005-06/acs-oc061305.php

The favorite radio station thread reminded me of an experience while renting an SUV. I got an SUV as a rental vehicle last year for a visit to my sister (it came in handy for hauling around relatives and getting stuff to a park for my nephew's birthday). At one point, I had the radio on...

The energy density usually given for hydrogen is 142 MJ/kg, by which comparison is made to how much hydrogen would have to be carried for it to be competitive with gasoline-fueled vehicles: Bottling the hydrogen genie. "One kilogram of hydrogen provides about the same chemical energy (142...

Goodmorning, here is the problem that has troubled me and a bunch of my friends much of the day. A low-flying helicopter is flying a constant 200 km/h horizontally wants to drop a object into a open car which is traveling at 150 km/h on a level highway 78.0 m below. At what angle (with the...

Does anyone have any tips on how to make/build a mouse trap car, with the mouse trap being the only source of energy? I have an idea of what it should look like, and how it should work, but I'm really not sure. Is there any helpful hints that I might need while building my project for my physics...

I am looking for a book/s (yes I know this is the wrong section, but it will probably get more replies here :-p ). I want a book/s that is a big overview of all the transit systems (US and Europe in particular) But I also want a huge emphasis on cars in the US. I do not want a book that was...

If the frictional forces are independent of the area of the tire in contact with the road, what motivates this choice?

Why exactly do race cars have their tires heated before a race?

Why don't car makers produce cars with diesel engines coupled with electric generator and then use only electric motors for propulsion? You know what I mean? :redface:

If it takes 50 m to stop a car initially moving at 25 m/s, what distance is required to stop a car moving at 50 m/s under the same condition? a. 50 m b. 100 m c. 200 m d. 400 m This is probably a really easy question, but I just can't see how to work it out. I tried to set up a...

1. Two railroad cars traveling at 5 m/s collide with three railroad cars at rest. The cars link together and move further down the track. Assume each railroad car is identical to each other. What is the speed after the collision of all five cars. This is the question I have and I see I...

A city planner is working on the redesign of a hilly portion of a city. An important consideration is how steep the roads can be so that even low-powered cars can get up the hills without slowing down. It is given that a particular small car, with a mass of 1500 kg, can accelerate on a level...

The driver of a pink Cadillac traveling at a constant 60 mi/h is being chased by the law. The police car is 20 m behind the perpetrator when it too reaches 60 mi/h, and at that moment the officer floors the gas pedal. If her car roars up to the rear of the Caddilac 2.0 s later, what was her...

Hi, I got a few questions on ground effect : 1. When a plane lands, there is a period of ground effect, when the plane is less than 10 feet above the ground and the flight is very smooth. Can someone remind me why it is so smooth? 2. Does ground effect have any effect on regular or race...

Carbon fibre is used in formula one cars to decrease load and increase aerodynamics. Is there a bearing which also works in a similar means ( re: light weight, as strong as current auto specs)?

[SOLVED] Cars Versus Horse on Dirt Track Ok, A little off topic, but something my co-workers and I have been arguing about. They believe if i were to race against horses on an equestrian track in my 240 horsepower 3000lb car, the horses would beat me. With their very un-educated...

Hi, I am new to this site and i have a question that has been making me thinking for ages, what factors other than different grades of fuel and oil in F1 engines increase the power, because i have found that say Honda or BAR are down on BMW and Ferrari in terms of power by up to 100HP. Thanks Max

The rear view on the passenger side of late model cars warn us theat objects may be closer than they appear. I think the mirror used is convex. But why is that type of mirror selected? thanks joe

I was wondering me why the most powerful cars have usually tyres with a great band widht. Surely it is not a question of adherence, because friction factor is not a function of the contact area, but the type of surfices. Does it do with traction stability?. I have heard that F1 cars have reduced...

What kind of cars do you prefer? Ones that are European, Asian, or American? SUVs, Sedans, Sports cars or Vans?

For my science fair project, I am testing the effect of changes in mass on the time it takes a car to complete a roller coaster track. The track is made of hotwheels track and has an initial ramp, two turns and a loop. I used the same car both times (once without added weight and once with an...

I got to write a term project about "physics in Cars" I am a little bit short on material to write about I know that spoilers are about aerodynamics in cars plus there is air friction I know momentum is ýnvolved ýn safety(airbag safetybelt) and crashing I know frýctýon of the tires in...

firstly, i am not an enginneer or a physicist, so if i write something foolish, have that in mind. i have heard that the reason why some cars have spoilers is to counter the upward lift that the air gives to the underbody of the car as it accelerates forward. this stabilizes the car at high...

What are all the advantages of good aerodynamic design and how can these be proved mathematically? For example what is the difference between a truck with a wind deflector and the same truck without the wind deflector?

I am doing a science experiment dealing with car physics. The experiment I am doing involves battery-powered toy cars approximately the size of a hand (four-wheel drive). I am not sure what effect the weight distribution has on the acceleration of the car. To be more specific, I am looking...

Anyone here buy a used cars before? If so what was your experience like and can you give us some tips.

Been brought to my attention in another topic, so just how is it that technologies suck as traction control make a formula 1 car harder to drive? This is directed at Mr Robin Parsons, but obviously anyone can join in.

How long does it take an automobile traveling in the left lane at 60.0 km/hr to pull along side a car traveling in the right lane at 40.0 km/hr if the cars' front bumpers are initially 100 m apart? I know the velocity of the car in the left is 60 and the velocity of the car on the right is...

As I've learned from the "Physics of Racing" series by Brian Beckman, weight transfer of a car during braking can be determined by the acceleration, height of the car's center of gravity, length of the car's wheelbase, and weight of the entire car. Now I realize that changing the spring rates...

1. A 16-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 24 N. Starting from rest, the sled attains a speed of 2 m/s in 8 m. Find the coefficient of kinetic friction between the runners of the sled and the snow. 2. A dump truck of 2500 kg is being...

http://news.bbc.co.uk/2/hi/uk_news/3178579.stm

http://auto.howstuffworks.com/air-car.htm

Help ASAP please! Can someone please show me how to do the 2 problems below? I really don't know how...Thanks 1)The number of new cars purchased in a city can be modeled by the equation C=22t^2+17tt+9933, where C is the number of new cars and t=0 corresponds to the number of new cars...