Car Definition and 999 Threads

A 1689 kg car collides head on with a 2000 kg truck. The collision is elastic. If the velocity of the truck is 17km/h in the same directions as the car's initial velocity, what is the initial speed of the car in km/h? I'm getting an answer but doesn't seem to make sense. So I'm...

if a car of mass 980kg accelerates up an incline (10°to the horizontal) and increases its speed from 8.3m/s to 13.8m/s in 60m, both the air resistance and rolling resistance are taken as constant at 50N and 200N respectivelyfor the acceleration period described, determine work done work done...

Homework Statement The problem is that there are too cars and they crash and we have to gigure out which one was the one that caused the crash? Also it is a four way stop here is a pic that would help Homework Equations Find Velocity The Attempt at a Solution I don't...

My car is just a plain green Mazda 2, and I'm starting to see a lot of those around. I wanted mine to be different somehow, plus the plain green is getting kinda stale. I was wondering if anyone here has had any experience with getting a design painted on their car. I have some questions about...

Homework Statement There is 14 kg of mass kept on a chassis (consider chassis weightless). Chassis is having 2 identical rear wheels and 2 Steel caster ball wheels at front. Consider the weight distribution to be equal on each of the wheel. All wheels are coupled to a DC motor-gearbox (1:1)...

Homework Statement This is not a homework question per se but rather something I was thinking about while driving the other day. I am in a car on a hill with constant slope traveling at an initial speed. How can I come up with a set of equations describing both velocity as a function...

Homework Statement Gasoline has an energy content of about 132.65 MJ/US Gallon. An average passenger car has a mass of 1500kg. The average vehicle experiences a drag force F(drag) = (0.176 kg/m)v^2, regardless of road conditions. A uniform and level road surface provides a 'rolling...

I've had the same CD in my car that I've been listening to for almost a year; a lot of the songs are great, but I'm starting to get sick of some of them. I've started putting some new songs together for a new CD, but I only have this list so far: - All Along the Watchtower - Another Brick...

Can we assume that the coefficient of drag of a car model is constant using one of the values from: http://en.wikipedia.org/wiki/Drag_coefficient The reason I ask this is because the coefficient of drag of a car varies with velocity. So wouldn't it change depending on how fast the car is...

Homework Statement Why does friction act towards the center when a car does uniform circular motion by itself. The Attempt at a Solution I know that centripetal force is needed to move an object in a centre and so there should be a force acting towards the center in the circular...

hello to everyone, I'm sorry to bother you with what may seen a very easy question but I'm hoping someone can help me with the correct scientific answer. now there has been a debate regarding tyre pressures in car tyres corresponding with there size and shape, a lot of people say that the...

Homework Statement A pullback toy car is pulled back. How far will it go before it stops? x(0)=0 v(0)=0 a(x<x0)=-k(x0-x) a(x>x0)=μg v(tf)=0 tf=D Homework Equations Fs=-kx F=mg Ff=μF The Attempt at a Solution d2x/dt2=1/m(k(x0-x)-μmg) Later in the run spring constant...

You are driving down the road at almost the speed of light. And you fire a powerful laser that is attached to the front of your car. The laser beam hits a guy standing at the side of the road and goes through his hand. But to the guy at the road, your laser beam can't hit him, because to...

I need rough values for power consumption of an average sized car at different speeds. Does anyone know how to either calculate or where I could find such information? Thanks

Homework Statement (Assume no friction) A car that has a mass of 3970 kg is accelerated from an initial velocity of 0 up a ramp that is 50 meters long (the hypotenuse) and has a height above the ground at the end of the ramp of 10 meters. The velocity of the car at the end of the ramp is 150...

Hi, I am confused a little bit with the forces acting on a vehicle when it's negotiating a bend, at constant speed. Please click the link to see my sketch. On the plan view I see that it's moving with constant speed, along a circular route. That means there is unbalanced force...

Hi, This is my first post here. I am planning to work on small project for my car, wherein I could power up a small inverter which would in turn start a fan / ac in my car. I am just confused on how many panels I would need to accomplish this project. solar panel output 4V -100 ma...

Car wheels spin backwards and the friction force acts forward so the resultant force allows the car to move forward right? because I saw someone say something about... cars appear to be spinning backwards on tv. But in reality aren't they really spinning backwards?

Homework Statement You've taken your neighbor's young child to the carnival to ride the rides. She wants to ride The Rocket. Eight rocket-shaped cars hang by chains from the outside edge of a large steel disk. A vertical axle through the center of the ride turns the disk, causing the cars to...

Homework Statement An automobile with a mass of 1321 kg has 3.40 m between the front and rear axles. Its center of gravity is located 1.78 m behind the front axle. (a) With the automobile on level ground, determine the magnitude of the force from the ground on each front wheel (assuming equal...

After getting an oil change yesterday, the people there said my air filter was pretty dirty and it needed to be changed soon. They didn't have a replacement, but said the one I need is like 50$. I was wondering if you really need to replace the air filter, or if you can just clean it. If you...

Homework Statement A car with mass of 1200kg turns sharply with a radius of 40m and at 15/ms. The tires have a static friction of 0.9, rolling at 0.6 and kinetic at 0.3. 1) how long does it take to make a turn at half a circle. 2) what is the magnitude of frictional force on the tires in the...

I search after information in these things: I think there are a lot of controllers and processors in the car but in which devices in the car they are and what them doing in these devices? What are the operating systems in the cars? What is algorithm for robust control?

1. A Car accelerates from 0-100 km/h (27.77 m/s) in 4.8s. What F (in Newtons) does a passenger of mass 68 kg experience during acceleration 2. I feel like I'm solving this too easily and am missing something 3. F=ma. a= Δv/ΔT. 27.77/4.8= 5.78 F= 68*5.78 F=393.52N ?

Homework Statement A 1200 kg rocket car is placed at the bottom of a 100 meter long ramp inclined at 10°. The rocket is turned on and it exerts a force of 8300 N for 5.70 seconds, and then it shuts down. Find the speed with which the rocket car leaves the ramp (assume frictionless)...

Question: A car is initially 4.0km/h south of a gas station and is moving at a constant speed of 55km/h due north. A truck is initially 6.0km north of the gas station and is moving at a constant speed of 45km/h due south. How far are the vehicles from the gas station when they pass each other...

Homework Statement A car is driving 25km/h upward a road,the road is under a angle of 4 degrees.The same car goes 100 km/h when it goes downward the same road,in both cases,when the car is driving upward and downward it's using the maximum possible power of the motor.Whats the speed of the car...

I'm confused about the relationship between the voltages of different power sources. Since a car battery is more powerful than an adapter and both are known to have output of 12 Volts, what can be said about how much power is consumed by the devices running on 12V? Will the same amount of...

Homework Statement A car accelerates at 9.8m/s^2 How long does it take to go from 0-60 MPH? Homework Equations I don't know which ones may be relevant, this is where I'm stumped. The Attempt at a Solution I somehow got 2.77 seconds as an answer but I'm not sure how I got it. I am...

So I'm new here, and I apologize if I've posted in the wrong format/place/etc., but this is a makeup exam question, and I (think) I've finished it, but I want a second opinion on the correctness if you guys wouldn't mind. :smile: Homework Statement A speeding driver passes a hidden police...

That's me in the #44 car!

Hey. Was jump starting and charging a car battery a couple of days ago for the first time. I connected the positive of the bad battery to the positive of the good battery, then connected the negative of the good battery to a solid metallic, non-painted part of the engine on the bad car, or the...

Homework Statement A frictionless car on a straight track tipped at 8.21° accelerates at 1.40 m/s². Released from rest and travels through 2 photo gates. First is 18.8cm away from starting position. Second is 14.8 cm from the first one. Whats the velocity as the car passes through each gate...

Two forces applied to car, direction?? Homework Statement Here is my given diagram and problem: Homework Equations I'm stuck on finding the direction. I tried using the equation theta=tan^-1(Ay/Ax), and the answer was incorrect. The Attempt at a Solution As you can see, I have...

I studied mechanical engineering in college, so electrical engineering isn't my strongest suit. Basically I have a 12V car battery that I need to discharge to 70%, how can I do this? I know that I can monitor the state of charge by determining the open circuit voltage after ~24 hours of...

Homework Statement The two cars A and B enter an unbanked and level turn. They cross line C-C simultaneously, and each car has the speed corresponding to a maximum normal acceleration of 0.94g in the turn. Determine the elapsed time for each car between its two crossings of line C-C. What is...

When a car drives on a banked curve it pushes into the ground and the ground pushes back making its normal force bigger then it would be just form the perpendicular component (to the road) of gravity. And at a perfect speed, the normal force’s up component balances the gravity. My first question...

[b]1. A racing car of mass 950kg accelerates from 30km/h to 170km/h over a distance of 220 meters. Frictional forces and wind resistance can be assumed to be 750N. Determine the tractive force produced by the car to provide this acceleration The car finally reaches a speed of 250km/h...

Homework Statement A pendulum length l is suspended inside a railroad car. The railroad car is oscillating so that its suspension has position xs = A cos (ωt) and ys= 0. Use the angle \varphi as the generalized coordinate and write down the equations that give the Cartesian coordinates of the...

Homework Statement The driver of a car wishes to pass a truck that is traveling at a constant speed of 20m/s. Initially, the car is also traveling at 20m/s and its front bumper is 24m behind the trucks rear bumper. the car accelerates at a constant 0.600 m/s^2 , then pulls back into the...

Homework Statement You are driving your car and you heavily apply the brakes for a period of 2.1 seconds. The car keeps moving for a distance of 14.6m before it completely stops. What is the acceleration (in m/s2) experienced by the car? Is it truly "acceleration"?Homework Equations 5...

Does a stronger engine need a higher viscosity fluid? What's the reasoning behind this?

Hi I have been having a hard time visualizing how a car must turn in a curve we know 2 things: 1. if the steering wheel is held at an angle, the front wheels must be at a certain angle relative to the car frame as well as the back wheel at all time. 2. the wheels cannot have any...

Hi, This is not related with a specific homework question. I was studying this topic and have noticed that I didn't understand some bits.The car is negotiating a bend with a speed of V. The slope of the banket is θ The coefficient of friction is η Weight of the car if mg Radius of the bend is R...

A model car with a main body mass M and four wheels each with mass m is rolling down a track at velocity v, when it encounters a step of height b, which is less than the wheel radius r. The wheels are rolling, not sliding, and we know the moment of inertia around their respective centers and...

Some people park their cars with wheels turned and other do not. I myself like the straight wheels while parking. But technically, are there any problems if I park not straight ?

Hello dear physicists :) I have to admit it's been a long time since I studied physics in the university. And Sorry to disturb you with this video. Of course it is a very bad ad for Camry and the Saudi driving: But what catches my attention is how can the car spin that "violently"...

Hi everyone! I'm struggling to get my head around a calculation having not done any physics studies for 10 years - My brain is a little rusty. Please consider the following scenario: Railway trucks (railroad cars) are shunted around a yard using a tractor (Its a farm tractor on rubber tyres)...

Homework Statement Homework Equations F = ma The Attempt at a Solution First off, to keep the car from skidding to the side we want it to be constrained to move in a circle about the center of the turn because if it skids then it has deviated / veered off tangentially at some point...