Car Definition and 999 Threads

I got one multiple choice on our exam incorrect, and I was wondering exactly why this answer is correct: When you accelerate your car, the front of the car lifts up slightly. Or when you brake, the front dips down. The primary reason is because the A) center of mass of the car and its...

Hi, There is something weird here: Please look at problem and solution. When I set my equations: 2000a=2000gsin(30°)-T 1800a=-1800gsin(20°)+T I add them up: 3800a=2000gsin(30°)-1800gsin(20°) a=1m/s^2 Now I want to equilibriate the car: The force of brakes=-2000a=-2000a=-2000N...

Homework Statement A car weighing 789 kg hang at an angle of 90°. What is the tension in each cable? The Attempt at a Solution (deleted answer)

Homework Statement Suppose one gallon of gasoline produces 1.01×108 J of energy, and this energy is sufficient to operate a car for 18.2 miles. An aspirin tablet has a mass of 332 mg. If the aspirin could be converted completely into thermal energy, how many miles could the car go on a single...

I played around in another thread with mathematically determining where a car should be time wise on 1/4 mile run. I had a chance to drive this car myself giving me more information than you normally have on a car you have yet to buy. As I thought more deeply about my calculations, I became...

Homework Statement a cars engine produces constant power therefore the cars speed will increase at a constant acceleration. is this true or false Homework Equations Power=w/t work=fd so P=mad/t The Attempt at a Solution so if p is constant it appears a must be constant...

a friend and i have been discussing taking what we know (mostly what i know) in the field of mechanical engineering and designing and building a car.. it will be my car, but he's willing to help with it the body style of this car might look something like a cross between a corvette/viper and...

Homework Statement When the car is at rest, normal reaction 1 and 2 act on the car's front wheel and rear wheel respectively . The problem is when the car starts to accelerates by rotating the wheels ,how would the normal reaction force change? Homework Equations The Attempt at a...

Hello I know this sounds stupid but my friend told me about something that made me think. So what he told me was that every point on a car wheel is still for a very small fraction of time Point x is stationary at this point in time but as the wheel moves forward it revolves around x and...

I would like to know the calculations regarding tracing of the path followed by a car during turning process. i have the following details , kindly do tell what other information is required and how the equations are formed. front wheel track - 1559 mm rear wheel track - 1605 mm...

Currently I'm researching consciousness in relation to the physical universe. This thread is to ask if any physicists here know about this phenomena and can possibly describe why it happens and how it works. I'm not sure it is a phenomenon, but I do recall it happening to me more than once as a...

Homework Statement a car travels along a straight path at a constant speed of 60mi/h for a distance d and then another distance d in the same direction at another constant speed the average velocity over the entire trip is 30mi/h what is the constant speed with which the car moved during...

A lot of people have been arguing that TSLA's stock/the company in general won't take off because the demand is above the battery technology at this time. I'm a junior in college studying physics but will probably either switch to finance and do stocks because i like it more or i was double...

My question and attempted solution are in the pics below...not sure if what I did was correct though :/ I was thinking that the work done would have been equal to PE+Change in KE + Energy Lost to friction...but not sure how to calculate the energy lost to friction as I'm not sure if it has to...

Homework Statement A car traveling at 50.0 km/h stops in 70.0 m. What is the stopping distance if the car's speed is 90 km/h? Homework Equations This is a question in the unit about momentum & energy, so most of the questions have been applying formulae about momentum, work...

A friend asked for help with a problem, and I tried to go about it as logically as possible. His class is different, so I wasn't really sure how far into it they were and what equations to use. Anyway, I wanted to make sure we didn't get it wrong. Could someone check it, please? I'm especially...

Homework Statement Gasoline has an energy content of 9.38 × 10^5 J/oz. If a car, with a mass of 1500 kg, is accelerated to a speed of 29.1 m/s, how much gas is consumed by the engine, assuming 40% efficiency? Homework Equations w=fd w= ΔKE The Attempt at a Solution So I...

A 1000 kg car is moving at 10 m/s, the car applies the brakes and begins to skid and leave a mark. the first 4 m of the surface has a coefficient of 0.35 and after that the coefficient of friction is 0.2. What is the total distance the car will slide when coming to rest? Equations: F=ma...

Homework Statement A 1200 kg car accelerates from 0 to 27 m/s in 60 seconds. a) What is the power outage from the engine in watts? b) What is the power outage from the engine in horsepower? Homework Equations 1/2 mgy=v 1 horsepower=746 Watts The Attempt at a Solution My...

Hi Guys, If I were to build a model car, with each wheel having it's own servo, then how can I make it turn in one direction. Say if I want to turn left, if I cut power to the front left and reduce the speed of the rare wheels will the front left wheel act as a pivot? Or should I cut power of...

If a car is traveling towards a bridge at a constant speed of 20ms-1. The bridge takes 30s to cross entirely. The car creates a force of 3000N. Calculate the mass of the car when it is on the bridge. a=(v2-v1)/t F=ma I figured that a = 0 due to the fact that the car is traveling at...

Dear All, I was involved in a car accident. The facts of the case as follow: Location: At a side road joining into a major road. The side road slopes downwards on a 10 degree gradient to the major road. My car was the first vehicle awaiting to exit into the major road. Background of...

My father's thinking of buying a new car and I'm trying to do research online to help him make the right choice. The issue is that I can't find any research whatsoever. All I get are subjective reviews (which seem to be just marketing ads) and anecdotes. I can't find objective information on...

Yesterday I saw a car with a North Carolina license plate that read BUBBLY:-* (actually the * was in line with the preceding dash, and not raised superscript-style.) I didn't know such a thing was possible. And yes, it was an official state license plate. I was able to get a good look...

Kinematics -- How fast does the car stop? Homework Statement A car is moving with a speed of 32.0 m/s. The driver sees an accident ahead and slams on the brakes, giving the car an acceleration of -3.50 m/s2. How far does the car travel after the driver put on the brakes before it comes to a...

Homework Statement A car level on ground, starting from 15m/s, decelerates uniformly to rest in 20 seconds. What distance does the car cover while decelerating? Homework Equations Vf = Vi+at Vf^2=Vi^2+2aX X=Vit+(1/2)at^2 X = Distance Vf = Final velocity Vi = Initial velocity a...

Homework Statement There is a classic story (likely apocryphal) about an astronomer who was caught by a policeman for running a red light. The astronomer went to court and pleaded innocent, saying that the motion of his car made the red light (with a wavelength around 700 nm) shift to a green...

Hi, Homework Statement A cable car slides without any friction along a horizontal wire with initial velocity v0. The car is half filled with water and its mass (with the water) is m. At t=0 it starts raining (perpendicular to the ground). The rate at which water is collected in the car is k...

Homework Statement A car is driven at a constant speed of 10.0 m/s as it travels over a circular-shaped arch. If the radius of curvature of the bridge is 50.0m, what upward force does the car exert on the 64.0 kg person riding in the car as it passes over the bridge?Homework Equations v2/r=ac...

Homework Statement A car is driving 40 m/s north on a flat surface when the driver throws a ball out the window. The ball leaves his hand moving horizontally and perpendicular to the car with a speed of 20 m/s with respect to the car. At the moment the ball leaves the driver's hand, it is 1m...

Homework Statement If I pulled out in front of a car tht was going constant velocity of say 10m/s and I accelerated to 10m/s in 5 sec, is there a use for calculus to show the point of a collision if any or time safe distance required to avoid a collision? Homework Equations The...

Suvat equations -- car braking hard to avoid a collision Homework Statement A car (A) is speeding along a rural road, of width 4m with a speed of 25m/s when the driver sees another vehicle (B) of length 3.5m just starting to cross the road at a point 40m ahead. The drivers reaction time is...

Hi all, During steady state cornering which tire of the same axle experiences the higher side force? I believe the external one for higher normal load due to the weight lateral transfer. Is it true?

The static friction force which provides the acceleration of a car does not move through a distance (the point of application is stationary with respect to the road at any instant). Isn't it that only external forces may change the translational kinetic energy of an object? If so, and if the...

Someone said the following and it just doesn't sit right with me. How do I effectively tell them what's wrong here? " It applies to physics the same, as can be seen with the Kinetic Energy Formula Ke = 1/2MV^2...

I'm curious whether it is at all possible to rent a stick shift car in the US, or are they all automatic? I just received my driving license and I'd like to practice, so a road trip is on my list. I need a vacation anyway :biggrin: The problem is that in Europe (the countries I checked) I need...

Homework Statement A person driving a car suddenly sees a wall .At that instant velocity of the car is v. Coefficient of static and kinetic friction is μ. The mass of the car is M. To avoid the driver should ...(acc. due to gravity=g) a)apply breaks b)turn (the car shouldn't slip while...

Homework Statement Attempting to stop on a slippery road, a car moving at 80 km/h skids across the road at a 30 degree angle to its initial motion, coming to a stop in 3.9 s. Determine the average acceleration in m/s^2, using a coordinate system with the x-axis in the direction of the...

Hi, Suppose the police car moves faster than sound's speed and runs away from the person on the street. Will the person hear the siren? Regards,

Hi, Suppose the police car moves faster than sound's speed and runs away from the person on the street. Will the person hear the siren? Regards,

I was driving home today in my car, which had been parked in an exposed spot with a cold wind on it. It was very cold when I got in. I turned the heater (water valve control) on full but only had the fan on '1'. After a couple of miles, the engine thermostat cut in and the water temperature...

My textbook says : "The friction force on a car turning a corner does no work." I agree somewhat. However, if there is no work, there is no change of speed, aka no change of kinetic energy. How can a car in a real-life stop if it is doing perfect circles with forces pointing towards the...

I am wondering how much horsepower would be needed, or generated (not sure which term is right), if a diesel car with a 250HP motor, and weighs 3,500 pounds, is going up a slight incline (maybe 2 or 3 degrees) averaging 20 mph? Thanks.

can we convert the linear motion into rotational motion in cars using a fly wheel under the car ?

Homework Statement A car rounds a banked curve as discussed in Example 6.4 and shown in Figure 6.5.The radius of curvature of the road is R,the banking angle is θ,and the coefficient of static friction is μs. Determine the range of speeds the car can have without slipping up or down the...

This is in relation to the modelling of pedal input(\theta) to vehicle velocity 'v' by using controllers. In this video() the teacher says that humans accelerate the car NOT by sensing the pedal angle(\theta),but rather by sensing the change in the pedal angle over time(\frac{d \theta}{dt}). I...

Homework Statement A car accelerates down a hill,going form rest to 30.0m/s in 6.00s.A toy inside the car hangs by a string form he car's ceiling.The ball in the figure represents the toy,of mass 0.100 kg.The acceleration id such that the string remains perpendicular to the ceiling.Determine...

In my textbook, there is a problem that made me think a bit more (this is not what the textbook was asking). In the problem, there is a 1500 kg car traveling at 30 m/s on a 10 degree sloped hill (the car is driving uphill). The driver slams on the brakes and skids to a halt. We have to...

Hi gurus I am not physics but I would like to know the following car A jeep Grand C car B Jeep Liberty is it possible for car A to flip over car B if A hit B at 45-50 MPH. in a dry road condition ? Thanks a bunch

Hi. I have heard that with high speed of a car, its centre of gravity (CG) shifts backward. Isn't the CG a function of mass and dimension? Pl. explain. Thanks.