Car Definition and 999 Threads

Homework Statement A red van came through and crashed into a green van. The driver of the red van claims that he was driving at a speed of 11 meters/second at the moment of the crash. You want to find out if his claim is true. a. the mass of the red van is 1000 kg b. the mass of the green van...

So there is lots of information on the Internet specifying that the speed of light from the headlights of a car traveling at 30mph is C and not C+30 because it is impossible to travel faster than light but what about the speed of light from the brake lights pointing backwards? Am I right in...

Imagine a car is traveling east 60km/h, then after leaving the curve it's velocity is 60km/h west, what's it's change in velocity?

Homework Statement A car moves from X to Y along a semicircular path. The radius of the path is 250 m and the time taken to complete the trip is 50 s. What is the magnitude of the average velocity and the magnitude of the average speed? can you please explain? <3 Homework Equations v = wr = 2π...

Homework Statement A. A car moving at speed v can stop in distance d in time t. The same car moving on the same road at twice the speed takes what distance and what time to stop? Answer: a) Distance d and time t/2. b) Distance 2d and time t. c) Distance 4d and time 2t. d) Distance 2d and time...

Hi, I'm simulating the behavior of a car and I have some troubles with the tires. Specially with slip when the car is accelerating. I've seen many documents over the internet and I understood 2 main things: Wheel slip is necessary to accelerate & the coefficient of friction depends on the slip...

Homework Statement The century-old ascensores in Valparaiso, Chile, are small cable cars that go up and down the steep hillsides. As the figure(Figure 1) shows, one car ascends as the other descends. The cars use a two-cable arrangement to compensate for friction; one cable passing around a...

As I was driving I was wondering if there is way to know if the other cars on the road accelerating. I think that if I were traveling at a constant, then if the rate at which the distance my car and another car was changing was not constant, then the other car would be accelerating. But is there...

Homework Statement The question is asking when a car hits a wall, will the car or the wall experience the greater force. 2. Homework Equations The Attempt at a Solution I believe it's the equal force because of Newtons 3rd law

Hi there, Suppose we had a car going in a circle. We know that the turning angle(angle between the movement direction and the wheel axis) and the friction are connected, because friction determines the centripetal force and it determines the radius of the circle that we make with our car. I need...

Let us assume a remote controlled car which operates at 2.4GHz frequency band. When the accelerate or left or right turn button is pressed what value changes so that the car detects which button was pressed?

Homework Statement car is braking evenly. The brakes are in locking essentially (not ABS brakes) Car is sliding under sliding friction. Car comes to a fullstop at the distance of 150m starting velocity was 100km/h (27,77m/s) calculate a) braking time b)cars deceleration c) friction coefficient...

got a twin ls1 standing mile car project I've been toying with for a while.My question is the engines have beeen fit in the engine bay with the rear motor having minimal setback to allow room for the front engine,the total weight for both engines is 760 lbs,half of that weight is ahead of the...

I am working on building a solar powered toy car for my own edification. The problem I have is that I do not have enough power to start and continue the dc motor(s). I could add a bigger solar panel but I am trying to think of a way that the solar panel could simply collect the energy, store...

Hi, I am trying to build a solar powered toy car. And no its not for my son, its for my own curiosity. The problem I am having is that...while the solar panel is sufficient to rapidly turn the (4) micromotors 6 inches away from a lightbulb it isn't sufficient to even turn the wheels when I put...

Homework Statement There is a speedy car chase! A thief is getting away from a police officer. The distance between them at the start is 100m. The thief starts to accelerate at 5.0m/s^2 [F] from rest. Meanwhile the police is chasing him at its max velocity of 30m/s (sad... I know XD). Show that...

If I want to lift a car of 1500 kg with a air compressor and with 50 nozzles, what should be the size of nozzles and what should be the pressure of air compressor and at what pressure will the air come out through nose so that it could be easily be lifted.

Homework Statement Find the magnitude and direction of the Coriolis force on a racing car of mass 10 metric tons traveling due south at a speed of 400km/hr at a lattitude of 45 degrees north. Homework Equations F_{cor}=-2m\omega\times v The Attempt at a Solution \omega=2\pi/(24*3600 \quad...

Homework Statement With brakes fully applied, a 1480 kg car deccelerates from a speed of 91.0 km/hr. What is the work done by the braking force in bringing the car to a stop?[/B]Homework Equations 1/2(mass)(v^2) The Attempt at a Solution 1/2(1480)(25^2) = 462500 I converted km/hr to m/sec to...

I'm a bit confused by the physics of the mountain car problem. The problem concerns driving an underpowered car up a mountain. I had expected that the car would be able drive up to a point where the forward force due to acceleration is equal to the opposing force due to gravity and that the...

Homework Statement Suppose you’re on a game show and you’re given the choice of three doors. Behind one is a car, behind the others are goats. You pick a door, say number 1, and the host, who knows what’s behind the doors, opens another door, say number 3 which has a goat. He says to you, “Do...

Homework Statement Two cars collide at an intersection. Car A, with mass 2000 kg, is going from west to east, while car B, with mass 1500 kg, is going from north to south at 15 m/s. As a result of this collision, the two cars become enmeshed and move as one afterward. In your role as an expert...

[mod note: OP is ok, ref: https://www.physicsforums.com/threads/basic-relative-motion-problem.887296/] I can't figure out how to snap a picture and post here. So I'll try to explain the given scenario as best I can. Four distance versus time graphs are shown: Graph 1 is a constant/straight...

hello everybody! As an undergraduated student of engineering I have to design a elecric car radiator from the beginning! The truth is that am a little confused.. I started my calculations by estimate the rate of heat transferred by the drivetrain and finding the maximum delta T needed.. any idea...

Homework Statement A car enters a turn whose radius is ##R##. The road is banked at angle ##\theta##, and the coefficient of friction between the wheels and the road is ##\mu_s##. Find the minimum and maximum speeds of the car to stay on the road without skidding sideways Homework Equations...

Its my first time ever being in Physics and I need help with this probably really simple problem. It first says, a car is initially traveling at 25m/s and then coasts to a stop in 12 seconds. What is its acceleration? **I took 25/12 and got 2.08 m/s. Hopefully that part is right? Then it asks...

Hi, I've been dsicussing this with som friends, and would be thankful if someone took the time to explain it to me :) The scenario: Car A travels at constant velocity (80km/h) along the road and hits a brick wall. Car B acellerates upward towards 100km/h, and at excactly the moment it passes...

Homework Statement A car driver updates the springs of a car by replacing the old springs with stiffer ones. The old springs give an amount of 8 cm when under the car, and their length when not under the car is 29 cm. The spring constant of the new springs is 30 % greater than that of the old...

Homework Statement Our professor has tasked us to come up with a thought experiment to test the following scenario: "Two vehicles are going to race a fixed distance, both starting from rest. One vehicle has a greater maximum acceleration than the other, but a lower maximum speed. If both...

1. Question to problem A car moving with constant acceleration covered the distance between two points 57.9 m apart in 5.02 s. Its speed as it passes the second point was 14.4 m/s. (a) What was the speed at the first point? (b) What was the acceleration? (c) At what prior distance from the first...

Homework Statement A guy is 60 kg and he gets in a car which is 500 kg. the center gravity of the car is 0.3 cm lower, find the spring constant of the suspension Homework Equations F = -kx F = mg The Attempt at a Solution I got the answer but it s very low valve, the springs of the car should...

I am not sure if this is the right place to ask it, but this is a question that I thought today, and it gave me some curiosity to understand. Imagine that a car will curve, we can say the turn is a bit tight , what are the factors that can help it to flip? I was wondering about some aspects...

I'm trying to build a propeller powered car. Right now I'm trying to find ways to make if faster because I'm limited to a 6 volt battery pack. I was wondering if I used a nozzle shaped design like they do for rockets if it will make it faster or slow it down. The propeller is 6 inches and I was...

Yeah, I can't seem to figure this out.. school sucks. If your car travels 260 miles and uses 8.2 gallons, how many miles per gallon did you get? (Round your answer to three decimal places.

I'm given this problem to solve with the assumption as stated above. The answers need not be logical as long as the linkage mechanism can be simulated. I've attempted the question using Mercedes Mono Wiper mechanism but only manage to cover 41% given the width of the wiper. May I ask if there...

Homework Statement A car that weights 600kg, traveling at 300km/hr and the coefficient of static friction between the car and the road is 1.5, down force is equal to 2.6v^2 and air resistance is 1.5v^2 (v is in m/s). Calculate how many meters it would take for the car to stop with the breaks...

It boggles my mind how a car's subframe is only held on by a few bolts and some rubber bushings. How is it that the bolts don't just shear off? It would seem that the forces of driving, sometimes erratic, should easily overcome the strength of a bit of metal. People have been putting in...

acoording to theory of relativity, if a car is moving at a uniform speed then any object inside that car behave like its in rest. so what happens if a man throws a ball in an open roof car which is at uniform speed, where that ball is likely to land , assuming no other external force is...

Hi I am here asking for some help. I simply struggle with maths due to ahead injury sustained in a motor accident. I am trying to find out the forces that I suffered in the crash. I know from software forums people do not like doing other peoples homework, instead the goal is to help others...

Hello, I'm a mechanical engineering student and I'm working in traction control for Formula 1 cars. The traction control in the cars is simple, too simple: an engine cut is done when the engine is at a certain RPM and slip value. A matrix of four values of RPM and slip has to be provided to...

Im starting to learn about vehicle dynamics by watching video lectures here , and also reading the books by Gillepsie and Jazar. I´ve got a fundamental question about the FBD of the vehicle. According to Gillepsie :http://imgur.com/a/lGXxw http://imgur.com/a/lGXxw The vehicle is...

Imagine a car race about to take place. A car is starting at rest and when the timer goes off, the driver steps on the gas. The car starts off so fast, that its front wheels rise upwards so that all the weight of the car is held up by the 2 rear wheels. The car travels this way for a few...

It had to happen eventually. The world's first fatality while a car was driving itself. Self-Driving Tesla Was Involved in Fatal Crash If the car can't see a semi turning in front of it, you have to wonder if it can see a motorcycle or even other cars.

Hello everyone. This is a very simple project that I intend to build. It involves a cooler full of ice and water, two 120mm computer fans, a 240mm computer radiator and a 600 gallons per hour water pump. All these will run off the cars cigarette lighter rated at 12 Volts. I need your help to...

My father has this old mp3 player that he really likes to use. He uses it in the car often but the only problem is that, sometimes, the interference is so bad you can't hear anything. This only happens in car. What's more is that this only happens in the car when the driver's door is closed...

Homework Statement Hi I need to solve the next problem: a car with a total mass of 1950KG hits a speed bump at 19,4m/s. The speed bump is 0,05m high and has a angle of 45°. The car hits the bump with the front axle first. How much force acts on the front axle on the moment of impact. Homework...

Hello all, I'm building a miniature vehicle and plan on using a DC motor that supposedly spins at 12800 rpm (1340 rad/s) for the engine. However, I'm a little confused as to what the car's acceleration would be. The DC motor on its own would instantaneously have an angular velocity of 1340...

I was wondering what would be the car mileage, if we reduce the current Drag coefficient from 0.30 to 0.15? Or to 0.10?

Homework Statement // given in JavaScript var amount = parseInt($('input[name="amount"]').val()); var downpayment = parseInt($('input[name="downpayment"]').val()); var interest = parseInt($('input[name="interest"]').val()); var months = parseInt($("#months").val());Homework Equations What is...

Hello, I am a Telecommunications student who does not have a lot clue about cars.Does a car charges up its battery when it moves? What power supply is used for lighting in car, the battery? So if car charges the battery when it moves, why sometimes external/additional charging of battery is vital ?