Cars Definition and 435 Threads

I've been wondering about hybrid car technology lately and I'll start with just the most basic question to try and gain some clarity. I'll ask more specific questions if they come to mind after someone explains this first question. So, I was wondering why an electric motor is used in hybrid...

Homework Statement You're speeding at 85 km/h when you notice that you're only 10m behind the car in front of you, which is moving at the legal speed limit of 60 km/h. You slam on your brakes, and your car decelerates at 4.2 m/s^2. Assuming the car in front of you continues at constant...

Homework Statement A locomotive (6.4 × 10^5 kg) is used to pull two railway cars (Figure 11). Railway car 1 (5.0 × 10^5 kg) is attached to railway car 2 (3.6 × 10^ kg) by a locking mechanism. A railway engineer tests the mechanism and estimates that it can only withstand 2.0 × 10^5 N of...

Say cars are waiting on the lights to turn green. how many cars of dimension l,b can pass thru a road of width d in time t ? Another parameter can speed of the car s, also shape of the road whether its straight or curved I need a formula. I'm rusty with maths. Not sure if this is easy or...

I search after information about who the car can communicate with others cars and protocols for this? I know that these subjects are new so they are several start ups and labs in the universities that research these areas and I will glad to know about them. I will glad if you can help me to...

A banked circular highway curve is designed for traffic moving at 61 km/h. The radius of the curve is 201 m. Traffic is moving along the highway at 44 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to take the turn without sliding off...

Homework Statement Two traffic lights are 100m apart. Light 1 being due west from light 2. Car 1 is moving east at a constant speed of 25m/s. When car 1 passes light 1, car 2 starts from rest, west at a constant acceleration of 2.0 m/s². Where do they pass and how long after the light changes...

I do a small theoretical project, in this project I need to investigate some technologies or devices or knowledge that must to be related to cars or to futures cars or cars industry, it can be all the kinds of cars, not only private car, it can be also buses, tractors, trucks or all others kinds...

I've seen that in movies,cars with large tires . What's the purpose of this. Is it used for increasing the speed or the Torque ? With bigger tyres,I found analytically that both parameter would be increased. But would that not violate conservation of energy. Please point my mistake and furnish...

assuming the force F is exerted on car C and nearest to C is car B and remaining one is A. \vec{F}_{A} is total sum of all (interbody-) forces on car A . similarly \vec{F}_{B} and \vec{F}_{C} are defined. assuming the forces that the question asks is \vec{F}_{A},\vec{F}_{B} and \vec{F}_{C}...

Homework Statement Your car is going 78 mph on the freeway. Another car is going 58 mph in the opposite direction. How fast is the person in the other car going, relative to you? Homework Equations Your Car's Speed: 78 mph --> Another Car's Speed: <-- 58 mph The Attempt at a...

At the moment, I believe the fastest electric car is made by Shelby Super Cars and it can go at a top speed of 208 mph. Are there any estimates around predicting how fast electric cars will be once companies start using superconductive motors?

Homework Statement Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 4.2 m/s2 for 3.2 seconds. It then continues at a constant speed for 13.2 seconds, before applying the brakes such that the...

Hi, I and my team-mate have proposed an idea to develop a CO2 emission reduction device to be installed in automobiles. We have mentioned that it will operate on the principle of 'active adsorption of CO2 on charcoal'. However, although the basic scientific principle is pretty simple...

Hi everybody! I've been toying around with ideas for using electricity to propel any type of vehicle - gasoline, diesel, hybrid, or electric. The problem is I am not a Mechanical Engineer. So I'm wondering if anybody can tell me whether a drive system like this may be designed to be practical...

Suvat -- Two cars approach each other on a straight road Homework Statement Two cars approach each other on a straight road. Car A is moving at 16m/s and car B at 8m/s. When they are 45m apart both drivers apply their brakes. Car A slows down at a rate of 2m/s^2 while car B slows down at...

Hello, This one has been bugging me for a while. When you drive a car past parked cars that are somewhat close, with the window down, there is a rhythmic whooshing sound. This sounds very much like numerous dopplershifts, but I have difficulty seeing it as a doppler shift because the parked...

What happens when there is lean burn in a combustion engine? Does the reaction complete quicker? Is that why it is hotter?

Just out of curiosity, electric cars produce movement through converting electrical energy into kinetic via magnetic field and magnets, etc; would it not be possible to convert the kinetic energy back into electrical energy while the car is moving. I know the Law of Conservation of Energy says...

Homework Statement Two cars, A and B, move along the x-axis. Figure 2.39 is a graph of the positions of A and B versus time. (a) In motion diagrams (like Fig 2.13b and Fig 2.14b), show the position, velocity, and acceleration of each of the two cars at t=0, t=1s, and t=3s. (b) At what time(s)...

Hey guys, this is my second time writing this first time browser crashed and lost it all I hate it when that happens. Anyways I will make this one shorter. My name is Tom, dropped out of formal school in 7th grade due to family troubles, got my GED recently I am 28. I live in Las Vegas...

Hello, I am trying to solve the following problem from Sethna's book on statistical mechanics (not homework). On a Highway, the probability of a car passing in some interval dt is \frac{dt}{\tau}; \tau=5min. what is the probability distribution of time intervals \Delta between two...

Hi! Does anyone know which parts of an automobile would require the use of capacitors? Also, what kinds of capacitors are used in this case? (aluminum, tantalum, ceramic, ??) Many thanks!

Hypothetically, if two cars had large electromagnets with like-magnetic poles, would they repel if accelerated toward each other at a high rate of speed? Just one of those thoughts you randomly make up in your head.

Hey there! I was hoping to get some help on this question, I am not quite sure what I am suppose to do! :( Question: Consider the problem of the passing of one car by another. Assume that one car is moving at constant velocity, and the second car, the passer, has an initial velocity less then...

in cars front axle turns by diffrential but how rear axle turns it is possible wite pure rolling?

3. Two train cars are to be coupled on the tracks. One of the cars, say A is initially at rest. The other car, say B is traveling at a speed v toward A: Car B is empty, whilst car A is full of pig iron and has a mass of 102mB: After coupling, the two cars travel a distance of 20 meters before...

I have read some of the responses to the question of why a wind turbine would not be a useful source of energy for a car. Why could it not be used as a supplemental source to extend travel?

A car is traveling counterclockwise along a circular bend in the road with an effective radius of 180 m. At a certain instant, the car’s speed is 26 m/s, but it is slowing down at a rate of 1.0 m/s2. What is the magnitude of the car’s acceleration? I thought it was v^2/r but that isn't the...

Homework Statement A railroad car with a mass of 5.0x10^5kg collides with a stationary railroad car of equal mass. After the collision, the two cars lock together and move off at 4.0m/s. a) Before the collision, the first railroad car was moving at 8.0 m/s. What was its momentum? b)...

http://en.wikipedia.org/wiki/Chevrolet_Volt In this series hybrid, engine and generator charge the battery and battery powers the motor, and can be made with components already available. The Ampera is claimed to do 175mpg (vs 40mpg on my current car). So I wonder why there aren't more cars...

On a dirty car that's been traveling at a reasonably fast speed (I'm guessing at 50mph+) there is always dirt accumulation on the rear door rear edge, adjacent to the gap between the door and the bodywork. The accumulation is always on the upstream side of the gap i.e. on the door side of the...

What are the possibilities of using a waste heat recovery systems in the coolants of cars? Why is it not being done yet and how can it be improved?

1) when we steer a car, the front wheels point to the direction we steered in. why does steering change a car's velocity? does it have something to do with the angular velocity, momentum, or even torque? -i tried to think of the individual forces that act on each wheel, and all i have is...

1.Two stunt drivers drive directly toward each other. At time, t=0, the two cars are a distance 85.0 m apart, car 1 is at rest, and car 2 is driving towards car 1 at speed 13.8 m/s. Car 1 begins to move towards car 2 at t=0, speeding-up with constant acceleration 3.52 m/s^2. Car 2 continues to...

Homework Statement For the following remote controlled toy cars, write vector equations for their positions in the form r=a+tb (a=initial position vector, b=velocity vector, r= position vector at any time t sec, distances in cm) d. the car is traveling at 15cm/s in the direction 3i+4j...

We have a long debate on which transmission can accelerate faster. My idea is manual and I drive a manual, and I could pass other AT car (same capacity) quite easily. But some say automatic because the auto shift is very short. How about your idea?

First, we have "Zoombie Apocolypse" by Flex. I thought I would add to the fray. You can't make this stuff up, really, you can't. http://www.cbsnews.com/8301-201_162-57330270/sticky-goo-disables-more-than-100-cars-in-pa/: This story has all the feel of a Reality TV Show run amok (excuse...

hi experts Is collison of cars on road an inelastic collision? because friction force is present - please help me in this regard.

Homework Statement Indicate whether the following statements are always true or can be false. A) If two objects are under the influence of equal forces, they have the same acceleration. B) In order not to slow down, a motorcycle moving at a constant velocity needs a small net force applied...

Homework Statement Two cars go the same distance in a straight line. Car A covers the distance at a constant velocity. Car B starts from rest and maintains a constant acceleration. Both cars cover a distance of 517 m in 215 and are moving in the + direction. Whats the constant velocity of car...

I've been searching around the internet and there doesn't seem to be a straight answer for this. People just spit out an answer and don't back it up with any explanation. This is a complex situation in real life, so let's assume both cars are of the same mass and simplify the scenario by...

Homework Statement This question has gotten me stuck. I translated it from french to english so pardon that... I just get lost when you include two objects in physics. A car and a truck move initially in the same direction at 20 m / s, the truck with 38m ahead. The car accelerates at a...

Would it be better if cars are banned in the metro-cities? This would reduce all traffic problems, pollution problems, and excessive use of gas in the big cities, *1. There can be designated parking spaces outside the cities accessible through public transit so that people can commute outside...

Amy was traveling East with Perodua Myvi 1.3 when she entered the fateful intersection. When she reached the center of the intersection, her car was struck by the other car, Honda Insight which was traveling South. Her car skidded 15m and the Honda Insight skidded 30m after the collision. The...

Hi Physics Guys, I'm not a physics guy myself but some google searching lead me to this site so I signed up so I could ask a question. I'm into amateur motor sport and I'm currently driving a 1999 Subaru WRX. Anyway I'm always looking out for anything that will increase it's performance...

Homework Statement Two railroad cars, each with a mass of 7,000kg and traveling at 90 km/h collide head on and come to rest. How much mechanical energy is lost in this collision? Homework Equations KE=\frac{1}{2}mv^2 The Attempt at a Solution...

use of wind powered turbine in cars ?? helloo.. I'm just thinking to build an wind turbine powered car using with electric motor like an hybrid car .. there are certain question arises in my mind are .. that the use of turbine as a source of energy will be efficient or just theoritical concept...

Having trouble calculating Radial and Tangential aspects of a cars acceleration...! Homework Statement Here, I will just post the question as an image. Never mind the one where I have to sketch, but b and c I am having trouble with. How do you calculate the radial and tangential...

I want to calculate the difference in force between a car with a bull bar an a car with crumple zones hitting a pedestrian. Assume that when the car with bull bar collides with pedestrian, the transfer of velocity is completely transferred Known variables: Cars speed: 60kmph ; (16.67 m/s)...