Cars Definition and 435 Threads

Homework Statement Two identical cars (m = 1350 kg) are traveling at the same speed of 25.0 m/s. They are moving in the directions shown in the drawing. What is the magnitude of the total momentum of the two cars...

Hi All Hope this is the right forum, I am looking for an applied approach! I am interested in modelling the behaviour of CO2 powered rocket cars. These small models are powered by releasing pressurised carbon dioxide from a “sparklet” cylinder. The model cars race along 24 metre long...

Homework Statement Two cars are parked beside each other, facing in opposite directions. Car 1 accelerates at 5m/s^2 up to a max. speed of 25m/s, and Car 2 accelerates at 4m/s^2 up to a max. speed of 24m/s. How much time has elapsed when the cars are 200m apart? Homework Equations v=d/t...

Up to now I was absolutely sure it is impossible, but after seeing this video I have changed my mind. Yes, cars can run on water, and whoever says the opposite is a crackpot.

Okay, I know that solar radiation from the sun is already a source of energy to be used as an alternative energy source for light, but solar energy is only one source of light. Scientists have already thought of applying photons as a source of current that would be used to carry out a myriad...

Hey there! So, I've got this sample exam that I'm working my way through, and I'm stuck on a few questions, but this one is particularly frustrating me: A careless driver rear-ends a car that is stopped at an intersection. Just before the collision, the driver slams on his brakes, locking the...

Homework Statement The driver of a 3850 lb Pontiac traveling East at 32 miles/hr has a collision with a 3100 lb Toyota traveling East at 24 miles/hr. The coefficient of restitution is .27. Find: i) The final speed of the Pontiac after the collision ii) The final speed of the Toyota...

Hi guys I am in a big problem. I have to make a final year project. Although am interested in automobiles(cars) and have real talent in deigning their exterior. But my friends say everybody builds a cars or automobile as project ... make something different. What should i make? I thought i...

Homework Statement At t = 0, one toy car is set rolling on a straight track with initial position 16.0 cm, initial velocity -3 cm/s, and constant acceleration 2.90 cm/s2. At the same moment, another toy car is set rolling on an adjacent track with initial position 10.5 cm, an initial...

Homework Statement Two cars are driving on an icy parking lot, searching for a free parking space. The first car has a mass m1= 1000 kg and traveling at a speed of 20 km/h, the second car has a mass of m2= 800 kg and drives perpendicular to the direction of the first car at a speed of 15...

What a blight on society. Everybody hates them and the people who have them, except of course the people who have them. I have some neighbors who just moved in next door and the FIRST thing they do is turn the music on in their car. All you can hear is thumping and rattling of their trunks, so...

Homework Statement A 850 kg car is traveling west at 25.0 m/s when it collides with a 1050 kg car that was initially traveling north at 10.5 m/s. The cars lock together, and eventually skid to a stop. What is the velocity of the cars immediately after the collision? Homework Equations...

Homework Statement Two railroad cars, each of mass 1.6 104 kg, are connected by a cable to each other, and the car in front is connected by a cable to the engine as shown in the figure below. The cars start from rest and accelerate to a speed of 1.9 m/s after 1 min. (a) Find the work done...

Homework Statement Car A is traveling west at 60 km/hr. Car B is traveling north at 70 km/hr. The cars intersect at point O. When Car A is x km east of and Car B is y km south of O, the distance between the cars is z km. Find the rate of change of z when x = .8 km and y = .6 km. The...

Homework Statement Car A is traveling north on Highway 16 and car B is traveling west on Highway 83. Each car is approaching the intersection of these highways. At a certain moment, car A is 0.3 km from the intersection and traveling at 90km/h while car B is 0.4km from the intersection and...

Two cars are traveling at the same speed of 28 m/s on a curve that has a radius of 124 m. Car A has a mass of 1080 kg, and car B has a mass of 1500 kg. Find (a) the magnitude of the centripetal acceleration and (b) the magnitude of the centripetal force for Car A, (c) the magnitude of the...

i have just started with physics and i have a project where i have to make a scenario where two cars are drag racing in a quarter mile race and the one with the highest top speed loses. i don't even know where to start.

[SOLVED-Thanks AL]Mechanical Energy loss due to NC Forces: two railroad cars collide. SOLVED! - Thanks Al! Homework Statement Two railroad cars each of mass 4800 kg and traveling @ 80 km/h collide head on and come to rest. How much thermal energy is produced in this collision? Homework...

Homework Statement Two cars collide as shown. Car s1 is initially moving along the x-axis at speed v1 and car 2 is stationary. The final speed of car one is 10 m/s and goes 30 degrees north of x-axis. The mass of car 2 is 2000kg and goes 6 m/s at 44 degrees south of x-axis. What is the mass and...

2 cars drag racing question... Homework Statement The first car has a constant velocity of 40 m/s and moves 10 m before the 2nd car starts moving. The second car speeds up with an acceleration of 3.6 m/s^2. What is the time and the displacesment before the 2 cars actually meet...

What would cause more injuries to the passengers of each car? [no a pleasant example, I know] a) car colliding against brick wall. b) car colliding with an identical car moving in the opposite direction at the same speed. Does it have something to do with the amount of K.E liberated / lost?

"Following distance" between cars What is an effective rule-of-thumb for determining the following distance between cars? It might incorporate reaction time; relation between velocity, energy and friction; brake/tire/road conditions; and behavior of other driver.

Homework Statement Two cars are at rest, facing each other, and 300 metres apart. If car 1 accelerates at 6.00m/s^2 up to a maximum speed of 30.0m/s and car 2 accelerates at 5.00m/s^2 up to a maximum speed of 35.0m/s, how long does it take the cars to meet? Homework Equations vf= vi +...

1a. Homework Statement You are riding in a car over a hill that has a radius of curvature R. What speed should you be going if you want to feel one-third of your normal weight. Express your answer in terms of the radius R and the acceleration due to gravity g. 1b. You continue your...

A railroad car that weighs 20,000 lbs. is traveling eastward with a velocity whose magnitude is 5 ft./sec. A second car, on the same track, that weighs 40,000 lbs. is also traveling in an easterly direction with a velocity of 7.81 ft./sec. When the cars collided, they became coupled together...

Before I start studying the relativity theories, I have to grasp this concept: Suppose two cars are moving with constant velocities in any direction and a ball is thrown straight up and comes back straight down. This will happen in both cars. But what if a person in one car observes the...

Homework Statement A locomotive accelerates a 25-car train along a level track. Each car has a mass of 6.8e104 kg and is suject to a drag force f = 250v, where v is the speed in m/s and the force f is in N. At the instant when the speed of the train is 44 km/h, the acceleration is 0.20 m/s2...

A red car and a green car move toward each other in adjacent lanes and parallel to an x-axis. At time t=0, the red car is at x=0 and the green car is at x=220. if the red car has a constant velocity of 20km/h, the cars pass each other at x=44.5m and if it has a constant velocity of 40km/h, they...

Two cars travel westward along a straight highway, one at a constant velocity of 85 km/h, and the other at a constant velocity of 107 km/h. a) Assuming that both cars start at the same point, how much sooner does the faster car arrive at a destination 18 km away? An- swer in units of...

can anyone explain kers in formula one cars? like how it works on a mechanical level. and the difference between flywheel and electrical kers.

Is this stuff real? :bugeye: http://www.youtube.com/watch?v=KZOsOB3z3IE&feature=related

I hear this from people sometimes. Upon hearing about a bad head on collision, I will hear a person promptly add the two speeds together and claim the wreck for the drivers is as bad as slamming into a brick wall with that new speed (S = s1+s2). Is this really a good analogy? I'm not so sure it...

I was wondering what people thought about the CARS program. http://www.cars.gov/ It is a program with niche audience and clearly ill advised. Who is it for? The only thing I imagine it could do is drive the price up of used junkers cars due to people hoping to buy one cheaply but less than a...

Homework Statement Two cars drive on a straight highway, at time t= 0, car 1 passes mile marker 0 traveling due east with a speed of 20 m/s. At the same time, car 2 is 1 km east of mile marker 0 traveling at 30 m/s due west. Car 1 is speeding up with an acceleration of magnitude 2.5 m/s^2...

Homework Statement Car A travel at uniform velocity at 20 metre per second from t=0s. Car B starts with 5 metre per second during t=0s and accelerates uniformly to 30 metre per second in t=30s.It travels at constant velocity of 30 metre per second from there onwards Homework Equations The...

I kinda need help on this question because i can't find any article or references and please explain how the 3rd law related to safety devices in cars. Question: Access the design and use of injury prevention devices in cars in terms of Newton's laws of motion.

Not only are they ugly and break down, they screwed their own dealerships left and right! Why anyone would every buy an American car again boggles my mind. The shut down dealerships and ruined those buissness owners lives without a care. Just for that, I'll never, ever buy a GM car as long as...

The good the bad and the ugly. http://www.nytimes.com/slideshow/2009/06/01/automobiles/01GM_USER_SLIDESHOW_index.html

i dismantled a Remote controlled car for its parts and i saw on the electric motor some small capacitors. thats a diagram i know what a capacitor is but in this instance what is its actual purpose? help me please Cheers Demson

Homework Statement Three identical train cars, coupled together, are rolling east at 1.13 m/s. A fourth car traveling east at 6.43 m/s catches up with the three and couples to make a four-car train. A moment later, the train cars hit a fifth car that was at rest on the tracks, and it couples...

Ok, a bit misleading title, but interesting: http://www.youtube.com/watch?v=PW9gNaPDghw&fmt=18

Sorry i didn't know where else to ask this so I'm hoping you guys can help anyways. If a air moving over a wing causes lift then why do planes need to move in order for this to happen. What i mean is instead of moving in order for the air to pass the wing why can't we "blow" air at fast speeds...

Any one know how these are coupled to the engine on F1 cars? http://www.greentechmedia.com/articles/shock-therapy-cars-to-get-electro-power-boosters-5159.html They seem to work well for overtaking.

We have some unbelievable discussions regarding the acceleration of race cars. At first glance, many just look at what they remember, F=ma and go on long rants regarding engines that have high levels of torque. However, even when you rearrange the term to a=F/m, its still a Force at the...

Homework Statement Two carts are set up on an air track with a rubber band connecting them. The carts are pulled just slightly more than the length of the relaxed rubber band. Upon release, mass 1 travels a distance of x1 and mass 2 travels a distance of x2. Show that...

Am trying to know*how electric cars could be more desirable to own and the public views on the future of electric cars? [spam deleted]

Homework Statement A compact car and a large truck collide head on and stick together (perfectly inelastic collison). Which vehicle experiences the larger momentum change? Which vehicle experiences the larger acceleration during the collision? Explain your answers. Homework...

Homework Statement Two cars collide head on while each is traveling at 80 km/hr. Suppose all their kinetic energy is transformed into the thermal energy of the wrecks. What is the temperature increase of each car? (Assume each car's specific heat is that of iron) Homework Equations K =...

Homework Statement Two cars collide head on while each is traveling at 80 km/hr. Suppose all their kinetic energy is transformed into the thermal energy of the wrecks. What is the temperature increase of each car? (Assume each car's specific heat is that of iron) Homework Equations K =...

Why does the weight of a car transfer to the back when accelerating and the front when braking? I'm assuming it has to do with torque, but where is the force acting and how? I'm probably missing something really obvious