Car Definition and 999 Threads

Homework Statement A sportscar, Electro-Fiasco I, can accelerate uniformly to 100 km/h in 3.5 s. Its maximum braking rate cannot exceed 0.7g. What is the minimum time required to go 1.0 km, assuming it begins and ends at rest? Homework Equations $$\Delta x = \int_{t_1}^{t_2} v(t) dt$$ The...

So a truck hits a car, which is at rest. Would there be a moment in time when a car stops exerting a force in equal magnitude but in opposite direction (Newton's third law)? To put in some arbitrarily numbers to make the example easier to understand. Truck weighs 1000 kg, and the car weighs...

Homework Statement A car is traveling a road that makes quarter of a circle with a constant speed s. What is the magnitude of the average velocity v of the car? Homework EquationsThe Attempt at a Solution this is what I have down but I am not sure if I am right *constant speed formula...

Homework Statement A car traveling at 20 m/s stops in a distance of 60 m. Assume that the deceleration is constant. The coefficients of static and kinetic friction between a passenger and the seat are Us and Uk respectively. You may assume that the passenger is not in contact with anything...

Hello everyone! This is my first post, so excuse my improper etiquette (if any). Anyways, the Pinewood Derby, just in case you guys are unfamiliar with it, is an event that is held as a competition where small, homemade cars, race. The track is contains a ramp, which then leads onto a flat...

My book says option a,b,c is correct. I am able to understand the option a and b but why the friction has larger magnitude on rear wheels than the front wheels. Homework EquationsThe Attempt at a Solution According to me it should be same because weight of the car is equally distributed on...

Bob Simon of CBS News dead at 73 in New York City car crash http://news.yahoo.com/cbs-news-correspondent-bob-simon-killed-york-city-025008055.html What a loss! My condolences to his family, friends and colleagues.

I have a motorcycle battery which is 6Ah, with a maximum charging current of 0.6A/h. Is there a method of charging it whilst using a 2.7Adc (4A RMS) charger? I was thinking using resistors in parallel or series between the charger and the battery, but I am not sure exactly how.

If a car is on top of a mountain moving with an initial velocity, will it only forces acting on it be the normal force counteracted by the force due to gravity?

Homework Statement A 7.1 kg object hangs at one end of a rope that is attached to a support on a railroad car. When the car accelerates to the right, the rope makes an angle of 7.7 degrees with the vertical, as shown in the figure below. What is the tension in the rope in Newtons? Homework...

Homework Statement A car enters the freeway with a speed of 6.4 m/s and accelerates uniformly for 3.2 km in 3.5 minutes. How fast in m/s is the car moving after this time? Homework Equations DeltaX=1/2(vi+vf)(DeltaT) Displacement=1/2(initial velocity + final velocity)(Time interval) The...

Homework Statement A rocket car is constrained to move on an elliptical track (semi-major axis a and semi-minor axis b ). The car is moving at a constant speed v_0 . Determine the acceleration of the car in \frac{m}{s^2} . a = 4 \hspace{2 mm} km , b = 2 \hspace{2 mm} km , and v_0 = 360...

Homework Statement A car of weight 17[kN] starts to move. the coefficient of friction is 0.6. the dimensions in the drawing. The height of the CoM, point C, is 0.5[m]. the front wheels drive the car. What are the pressing forces on the front and rear wheels and what is the friction force on the...

Homework Statement The question is- What is the minimum coefficient of static friction that would keep the car from sliding off the curve? The Cars mass is 13500KG and it is traveling at 50.0hm/hr(13.9m/s) and the curve has a radius of 2.00 x102 m. I know the centripetal acceleration of the car...

Homework Statement In which case car engine must do more work: To start driving from 0 kmph until car reaches 27 kmph or to reach 54 kmph from 27 kmph? Force of resistance in both cases are equal. I need to base answer of this problem on formulas. I apologize for any grammar mistakes (i'm not...

I'm developing a 3 Dimensional android car game, so i need a formula to calculate the damage of the car after colliding the tree, wall or signal. I have velocity and mass of the car and also i have the mass and velocity of the colliding object. I use inelastic collision formula for signal and...

Homework Statement Homework Equations I have no idea how to start this question, I looked at my notes from class and the textbook but just can't figure out how to start it! The Attempt at a Solution Any help would be greatly appreciated! Even if just to get started!Thanks Thomas

I just wanted to know when we throw something like a ball up inside a moving car, the weight of that ball till it is air is 0 on the car.Does it mean that the car has become lighter and will take less energy to run.I know the effect is every small but please tell the answer.

Homework Statement Driving along a crowded freeway, you notice that it takes a time t to go from one mile marker to the next. When you increase your speed by 7.7mi/h , the time to go one mile decreases by 15s. What was your original speed? v1 = ? d1 = 1 mile t1 = ? v2 = v1 + 7.7mi/h d2 = 1...

Can anyone help me out and tell me what the average amount of ppm of NOx is in car exhaust with a catalytic converter? I found .4 grams per mile and can't seem to find any kind of conversion, but I am trying to compare it to another ppm measurement so it needs to be in ppm. Thank you

(i have made this thread as i previously had it in the aero section and it was probably not getting the attention such an important question deserves.) lets use the sunroof as an example for simplicity. what force is the wind acting on the dog at 50mph/22.3m/s? dog head diameter = 0.2m...

Just bought a Dash Cam for my car - HP F310. It is supposed to power up when the car is turned on and power down when the car is turned off. Seems to me that the only way it can do this is if the cigarette lighter plug that it is plugged into is "switched" (i.e., the plug is powered only when...

Homework Statement A car with a mass of 1000 kg crashes into a rubber wall with an initial velocity of 30 m/s and recoils at 15 m/s. The change in momentum occurs over 1 meter. Find the force that the car experiences and time for which this force acts. Homework Equations v22 - v12=2ad F=ma...

This is a pretty hot and rarely understood topic in the automotive / racing industry. Sure, everyone knows spinning mass on a car is worse than mass sitting in a car. its effects are greater, but by how much? Besides the benefits of the unsprung weight having less gyroscopic forces...

Hello Guys, I was wondering what will happen if the battery pack of my Honda civic hybrid dies (dies = malfunctions, stops working completely things like that) ? Moreover I wanted to know if the IMA/PDU can be removed (not used) to thus convert the engine into the a typical gasoline engine ...

Hello Guys and Girls, I wanted to know if my HYBRID HONDA CIVIC 2010 would still start up and run if my hybrid battery pack dies ? If it gets started and i am able to drive it, will it affect the car anyhow (apart from few MPG less) on a long term ? Thanks in advance. N.R.

As I am currently residing in Doha, Qatar, I've decided to base my mini-thesis on Solar energy. And although I haven't got it finalized yet, I'm thinking of investigating the efficiency of solar powered cars. I could build a toy car and input solar-powered batteries as opposed to another toy...

Homework Statement A total charge of 50 Ah is stored in a 12 V battery of a car. Each of the bulbs of the four parking lights is labelled 3,6 W / 12 V. Homework Equations a) Find the current from the battery when only the parking lights are switched on. b) What is the resistance of one bulb...

Hey, I've spent ages trying to solve what seems to be a pretty simple geometrical problem and I was wondering if anyone could help me solve it/give me some tips. I am trying to model how the suspension of a car behaves as a result of a displacement of the wheels. What the attachment shows is a...

I came across this problem which says" A pendulum is hung by roof of a train having mass 1 kg . The train then accelerates and pendulum makes an angle with vertical. What is acceleration of train? " Is it equal to gsinθ?

I have a few questions related to downforce in cars. Please forgive any fundamental misunderstanding of aerodynamics. Does the shape of a car, say a Volkswagen Golf, driving on a road produce lift or downforce? Is the Coanda Effect at play there? How does the height of the car above the ground...

Homework Statement Just found this site ,looks really helpful , so i am doing some revision using past exam papers and have a few head scratches you guys maybe able to help with . A car of mass 1000 kg is traveling at a speed of 25 m/s when it applies its brakes suddenly. The car immediately...

Just got a jump start due to having left my trunk ajar last night. Battery was pretty dead ~8.5V. Dead enough that we had to let the jumper car charge it for 10 minutes before it would start. So now it is running in my driveway. How long do you think it will need to charge before it will be...

Homework Statement A car with mass 2500 kilograms travels along a straight level road at 90 km/h. A headwind begins to blow with a force of 200 N causing the car to slow down. Calculate the car’s deceleration. Homework Equations The book uses the formula F =ma so 3. Book's solution = 0.08...

Two identical cars collide with equal and opposite velocity to each other. What happens to the energy? What happens to the momentum? Answer: energy is converted into heat and momentum disappears. But what has that to do with force?

Homework Statement The 1100 kg mass of a car includes four tires, each of mass (including wheels) 35 kg and diameter 0.80 m. Assume each tire and wheel combination acts as a solid cylinder. If the car is initially at rest and is then pulled by a tow truck with a force of 1500 N, what is the...

So, my proposition is this: (Note that this is a purely theoretical project, and no models/experiments are necessary.) When a car moves forward, wind moves backward, right (relatively). So if we were to attach a small, retractable wind turbine to the side, connect it to the alternator, we could...

Homework Statement N men, each with mass m, stand on a railway flatcar of mass M. They jump off one end of the flatcar with velocity u relative to the car. The car rolls in the opposite direction without friction. (a) What is the final velocity of the flatcar if all the men jump off at the same...

Usually when we've done free-body diagrams with cars, the direction of friction was reasonably opposite the direction of the motion. But here it's different... 1. Homework Statement All I want to know is why the direction of friction is forward. My only guesses are that the wheels are...

Would it be possible to put piezoelectric devices on the front of a car so that when the car is moving forward, the pressure from the wind on the car and piezo devices produces power to charge a battery? If the wind is strong enough, do you think there would be a considerable amount of energy...

I am a trucker. I drive a Freightliner Cascadia semi-truck. My cell phone charger will charge my cellphone with the engine turned off on my semi-truck. But the same charger will not charge up my cellphone in my car when my car's engine is turned off. Why will my charger charge up a...

Hi guys, I'm new to this forum and I just started working on my first coilgun. I've watched several tutorials on how to build a coilgun but all the capacitors they use in the coilguns are electrolytic capacitors. The capacitors don't deliver as much energy as the car audio capacitors. I'm...

In this time I try to search after information about 2 things: 1. the gas flow system in the car and the car exhaust 2. the materials that use in air pollution filters If you know good website / professor / paper / book / video lecture / other in one of this area so I will glad if you can let me...

Homework Statement Exam review question concerning 2 dimensional motion, the professor did not hand out an answer key and I am just looking for an answer check. A car launches at an angle of 30 degrees above the horizontal, off a cliff (50m), moving at an initial speed of 10m/s. Find the...

Homework Statement A "rocket car" is launched along a long straight track att = 0 s. It moves with constant acceleration a1 = 2.9m/s2 .At t = 2.8s , a second car is launched with constant acceleration a2 = 7.0m/s2 . At what time does the second car catch up with the first one? How far down the...

Hello all! I am a high school student who is taking my first physics class, Honors Physics. I have taken mechanical engineering classes prior to this class. We have recently been assigned our major project of the year: The Dreaded (by some) Physics Car. Our goal is to design and build a...

So let's assume I have 100 Nm at the wheel of a car, with a wheel size of 25 in diameter If I put wheels that are 24 in diameter, so 4% smaller, what exactly will change ? Will I have 4% more torque ?

Hello all, I have a DJI Phantom 2 Vision+ and I just recently had it painted. It is painted like a car would be painted. Ever since the new paint job, my drone is not flying right. It is displaying symptoms of Radio Frequency (RF) interference. The main issue is that it is now flying...

I want to know the equation by which we can calculate the turing radius of a car with respect to speed or track length as I am designing a racing track for my thesis project. Regards, M.Tayyeb

1. So the loop is known to be 12m in diameter (6m radius). Assume the car weighs 1250kg - how fast must the car go to clear the loop, and what will be its max G-forces endured? This was the question, which I have broken into 3 sections: a) Velocity at top of loop (done) b) Velocity at start of...