Cars Definition and 435 Threads

Homework Statement A family of nine has two vehicles, each of which can hold a maximum of five people. Homework Equations How many different ways are there of allocating people to the cars? If three of the memebers of the family only have a drivers licence, how many different ways...

Homework Statement Two cars are going to begin at rest and race 200 meters to a stoplight. One driver sneaks over and puts oil on the other car's tires, which reduces it coefficient of friction to .07. Assuming the first car does not slip then by how much distance will it win? Homework...

Natural Gas, It's the only logical substitute to Crude Oil. The mechanics of the vehicle are almost identical to gasoline, base infrastructure is already in place (pipelines), Although the major Oil producers also produce Natural gas, the US has reserves that match that of Saudi Arabia and UAE...

Kinetic Energy and cars... Please help Homework Statement One car has twice the mass of a second car, but only half as much kinetic Energy. When both cars increase their speed by 6.0 m/s, they then ave the same kinetic energy. What were the original speeds of the two cars. Homework...

two car cars "drafting" As posted by Hootenanny on another topic..he kindly replied "the car also experience fluid resistance or drag. For large objects traveling at high speeds the magnitude of the drag force is considered to be proportional to the square of the velocity of the car." Is the...

Homework Statement A ford is traveling at 59 km/h while a Holden has a speed of 60 km/h Calculate the velocity of the Holden relative to the Ford when they are traveling in: in the same direction The Attempt at a Solution 59+60 = 119 km/h However the answer is 1 km/h...

I'm leaving it to me to start a thread on cars, I hope I put it in the correct part of the forum. None the less, I'll start with a point than I'll start to ask a few questions and expect some opinions and answers. I can't drive automatic. No, it's not a type or a joke, I just can't do it. I...

Some buddies and I were discussing cars and their torque. We were wondering why the amount of toruqe that is exerted by the flywheel is not the same amount of torque at the end of the drive shaft. Does it have something to do with the longer the drive shaft the less torque? or does it deal with...

Homework Statement Two cars race around a circular track. Car A accelerates at 0.340 rad/s2 around the track, and car B at 0.270 rad/s2. They start at the same place on the track and car A let's the slower-to-accelerate car B start first. Car B starts at time t = 0. When car A starts, car B...

HELP!Cars collision problem Homework Statement You are a police officer analyzing the scene of a collision. On a rainy afternoon, a Porsche Carrera, of mass 1380kg, was traveling due north along Hwy38 near Verona, Ontario when a 2304kg SUV pulled out of a driveway (travelling due west) in...

Homework Statement how long does it take a car traveling in the left lane at 60 km/h to overtake another car traveling in the right lane at 40 kn/h when the cars front bumpers are initially 100 m apart? Homework Equations relative velocity equations V ab = v ae + V be The Attempt...

hi there...to all the enthusiastic people of thermodynamics/thermal engineering. I am working on a project to recover the exhaust heat of a car,for which i require a great amount of guidelines from ur side.firstly,I am not sure as to how much of heat is wasted through the exhaust. Do u think i...

Homework Statement A thief steals a car in front of two cops, A and B. The thief's initial velocity is 25m/s, cop A starts his car with 3m/s2, and cop B starts 10 seconds after cop A, but with 5m/s2. After 200m from his initial point, the thief notices the cops and start accelerating at 1m/s2...

Homework Statement Two cars, P and Q, are 1400m apart. P is traveling at 15 ms-1, Q is accelerating from rest at 5.0 ms-2 They are traveling opposite direction(i.e. they are facing each other), what is the time taken for them to meet? Also, what is the distance traveled by each car before...

SOLVED Homework Statement A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the = 34.0° angle. The magnitude of the force applied by each rope is 3500 Newtons. (I attached the image...)...

Homework Statement Two cars are at rest. Car A is at x=2500m, and Car B is at x=-1000m. At t=5s car A instantly travels at a constant velocity of 25 m/s in the positive x direction. At the same time car A takes off, car B travels at a constant velocity of 30 m/s, also in the positive x...

A red car and a green car, identical except for the color, move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 230 m. If the red car has a constant velocity of 24.0 km/h, the cars pass each other at x = 45.5 m...

1. a red car and a green car, identical except for the color, move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 240 m. If the red car has a constant velocity of 21.0 km/h, the cars pass each other at x = 47.5...

A car is traveling at a constant speed of 30 m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and has a constant acceleration. What acceleration must it maintain, so that the two cars meet for the...

Hi. I've been planning to get an electric car around 2010 or after when most manufacturers will have cars out. After some searching I've seen Chevy will have their Volt which can go 40 miles on a charge. Mitsubishi is making one (the Colt) that will go 90 miles on a charge. I'm not sure of the...

How do crumble zones on cars work in relation to Newton's 2nd Law (F=ma)?

[SOLVED] bumper cars and physics My group assigned me to make a graph of anything relating to bumper cars. They weren't very specific. I was thinking something that has to do with momentum and force or acceleration and momentum, or impulse and monoentum, but I'm not sure what would make sense...

http://www.popularmechanics.com/automotive/new_cars/4217016.html India’s largest automaker is set to start producing the world’s first commercial air-powered vehicle. The Air Car, developed by ex-Formula One engineer Guy Nègre for Luxembourg-based MDI, uses compressed air, as opposed to the...

i have a problem solving a linear motion question, this is the question two cars moving in a straight line of 70km with velocities 4.4m/s and the other 2.5m/s. when will they meet if a) they moved towards each other b) they moved in the same direction.

I understand very little of aerodynamics. Currently, my high school robotics team is designing a F1 model. Concerning aerodynamics, how do you use the Bernoulli's Equation regarding the design of the model car?

For each part of this question, consider a vehicle that is traveling at a speed of 30m/s and then stops as described. a) The vehicle stops under normal braking conditions over 100 metres. b) The vehicle stops due to a collision when there are ineffective crumple zones (e.g. the vehicle is a...

Having difficulty with the followingCalculating this collision, as the standard equation does not apply, i don't think. Question 1: A 2000kg car traveling at 24 m/s EAST (x), collides with a 3600kg truck traveling at 10m/s SOUTH(y). What is there velocity immediately after impact...

Homework Statement Given the following conditions, what is the relative velocity of 2 cars if their ground speeds are 80km/h for Car A and 45 km/h for Car B? a) both cars are heading in the same direction, A behind B in the reference frame of A b) Use the reference frame of B for part A) c)...

Starting from rest several toy cars roll down ramps at different lengths and angles. Rank them according to their speed at the bottom of the ramp from slowest to fastest. Car A goes down a 10m ramp inclined at 15 degrees, Car B goes down a 10 m ramp inclined at 20 degrees, car C goes down a 8...

Let's say 100 years from now... or 200. Whatever. Is it theoretically possible to make a fusion reactor the size of a small box... or a soda can? And if this could be possible, will the tech be purposely hidden or outlawed because it'd mean easier access to small nuclear bombs for terrorists?

I've seen the designs using the 555 timer as the base and making a 2 led IR emitter. These examples use 5v and only two leds to send the 40k signal. http://www.reconnsworld.com/ir_ultrasonic_555timer40khzir.html I would like to modify this design to run off 12v and use 8 infrared leds. I...

I came out to my car (a Chrysler) the other day and went to open my doors using my key fob when I noitced that the SUV (not a Chrysler) parked between me and my car flicked its lights. I was about six feet away from the SUV. Every time I pressed my buttons, be it lock, unlock or trunk, this...

[SOLVED] Constant Acceleration Homework Statement Two cars are traveling along a straight road. Car A maintains a constant speed of 80 km/h and car B maintains a constant speed of 110 km/hr. At t=0, car B is 45 km behind Car A. A) How much farther will car A travel before Car b overtakes...

Enuma's thread got me thinking why these isn't more buzz for the hydrogen cars like the Honda FCX, GM Sequel, Nissan Frontier, BMW 7...

Homework Statement Car A with mass 2400 kg is moving along a straight stretch of road at 45 miles per hour. Car B with mass 1100kg follows with speed 65 miles per hour. How fast is the center of mass of the 2 cars moving? Homework Equations Xcm=(M1X1+...+MnXn)/ (M1+...+Mn) The...

An ongoing argument that i can't seem to settle. Say two identical cars with the same total weight are traveling at each other at 100km/h and hit head on. Would this be the same as one vehicle hitting a brick wall at 100km/h or would the speeds combine and come to 200km/h? Assume...

Fill the tanks with the same type of gas. Determine how many miles they travel. Fill the tanks again. Determine the gas consumed by each. Calculate the equivalent amount of energy spent by each car (I need the equivalent amount of energy per gallon of gas). Calculate the energy per mile consumed...

i was wondering what this type of paint (the type you see on cars that changes colour as the car moves around) is called? and more importantly, how it works? is it just the different shades of light that reflect the different colours?

Cars Tires Slashed I had parked both of my cars on the street in front of my house, each had one rear tire stabbed in the sidewall by a knife, I'm guessing sometime late Sunday night. The Geo Tracker only gets 2,000 miles a year put on it, the 4-year old tires looked almost new. Discount...

You testify as an "expert witness" in a case involving an accident in which car A slid into the rear of car B, which was stopped at a red light along a road headed down a hill. You find that the slope of the hill is θ = 12.0°, that the cars were separated by distance d = 25.5 m when the driver...

You testify as an "expert witness" in a case involving an accident in which car A slid into the rear of car B, which was stopped at a red light along a road headed down a hill. You find that the slope of the hill is θ = 12.0°, that the cars were separated by distance d = 25.5 m when the driver...

Homework Statement A 1500 kg car moving east at 17 m/s collides with a 1610 kg car moving south at 15 m/s and the two cars stick together. (a) What is the velocity of the cars right after the collision? (b) How much kinetic energy was converted to another form during the collision...

The cable cars in San Francisco are pulled along their tracks by an underground steel cable that moves along at 9.5 mph. The cable is driven by large motors at a central power station and extends, via an intricate pulley arrangement, for several miles beneath the city streets. The length of a...

Homework Statement Describe how friction propels a car forward, then explain how friction slows a cars forward motion anyone have any idea?

Homework Statement Cars A and B are racing each other along the same straight road in the following manner: Car A has a head start and is a distance Da beyond the starting line at t=0. The starting line is at x=0. Car A travels at a constant speed Va. Car B starts at the starting line but has...

I believe this has just been tested (again) yesterday (Sept 17th/07) From: http://www.scenta.co.uk/scenta/news.cfm?cit_id=1217038&FAArea1=widgets.content_view_1&search_text1=&startrow1=16 The electric car just got a boost from the power generated by its own wind...! Article from JCNNetwork...

Let me start off by saying I'm not 100% certain that this is the correct forum for this to be posted in, if I'm incorrect in doing so, I apologize. I've found several threads previously discussed about mousetrap cars, none of which answer the questions I have. I have four days to design...

Homework Statement Two cars, A and B, are traveling in the same direction, although car A is 186m behind car B. The speed of A is 24.4m/s, and the speed of B is 18.6m/s. how much time does it take for A to catch B? Homework Equations Va+Vb=Vab, x=1/2(V0x+Vx)t The Attempt at a...

Hello, I'm looking for some sort of velocity time graph/table, which illustrates how a car accelerates in a range of 5 seconds or so. I'm trying to figure out at what point the car's acceleration will be higher than a runners acceleration. (It's only a matter of time before the car can overpower...

I'm interested in the physics behind racing Hot Wheels cars. When you release the cars from an incline, what makes some cars go faster than others? What would be the most important factor of a fast car (ex. weight, aerodynamics, etc.)? How could I modify a car to go faster? Thanks!