Race Definition and 226 Threads

Homework Statement A relay race is run along a straight-line track of length 300.0 m running south to north. The first runner starts at the south end of the track and passes the baton to a teammate at the north end of the track. The second runner races back to the start line and passes the...

Homework Statement The lake house is located in A, which is home of Mike. Against the shore, perpendicular to the 675 m distance is the island's beach house B, which is home of Tina. Mike walks along the beach at a speed of 6.9 km/h toward the sauna and the C arrives there exactly 10 minutes...

I am in the process of building an human sized electric race car, and am wondering what gauge wire would best benefit me. The car will be powered by 5 HR22-12, data sheet attached, batteries in series running at 12 V 20AH each for a total of 60V 20AH. This is an endurance race lasting one...

Homework Statement During a race on an oval track a car travels at an average speed of 200km/h. a) How far did it travel in 45.0mins? b) determine its average velocity at the end of its 3rd lap. Homework Equations ok I worked out part a of the question and that is fine. But logically...

Hi, I asked a theoretical question here a month or two ago and someone was able to help me. I have another: Imagine an interstellar race. Starship 1 heads from Earth toward Alpha Centauri at a constant rate close to the speed of light, then makes a loop and returns home. Ship 2 is faster, and...

raft for a "Daft Raft Race" Hi all, Now I know this has probably been asked already, and it's probably a very simple question, but I'm building a raft for a "Daft Raft Race" and I was just wondering how many litres of air in cylindrical, metal barrels would i need to support around 600 kgs...

Hey All, we race mini / kids ATVs at a national level. these little things use a CVT style transmission, which is critical for performance, and tuning is a pain. if you are not familiar with a CVT, the fundamentals are a spinning mass on the crank shaft that creates a force on a part...

Gravity is an important force in this world. if we presume humans have evolved over millions of years through a process of evolution why all the major and cellular mechanisms not gravity dependent. From our food intake to processes of excretion, blood pumping, breathing and down to cellular...

Fred and Frank : Fred and Frank are two fitness fanatics on a run from A to B. Fred runs half the way and walks the other half. Frank runs for half the time and walks for the other half. They both run and walk at the same speeds. Who finishes first? So I solved this. Frank finishes...

Was hoping someone might be able to assist in this problem Scenario is have a American football game with two team A and team B. Am trying to work out the probability of each team getting to 6 points first, from the following infomation: Let A be the event team A scores equal to or more...

Homework Statement Jack and Jill ran down the hill, Both started from rest and accelerated steadily. Jack accelerated at .25 m/s/s and Kill at .30 m/s/s. After running for 20 s, Jill fell down. A) How far did Jill get before she fell? 60m B) How far had Jack traveled when Jill fell? 50m...

Homework Equations v=d/t The Attempt at a Solution VL=VR+2km/h d=6km tL1tR+4min tL2=tR +2 VL= 6km / (2-4) = 3km/min which is OBVIOUSLY WRONG. I have tried numerous things for the past couple hours, but can't seem to figure it out/. Help?

Homework Statement to qualify for a race a car must achieve an average speed of 254 km/hr on a track 1600 meters long. if a car covers half the track with an average speed of 227.5 km/hr what minimum average speed must it have the second half to qualify? Homework Equations...

Hi, I am unable to figure this question. Could someone help please ? A new type of race has been proposed. The object of the race is to complete the course and stop on the finish line in the minimum amount of time. The race is exactly 1 km long. The car can accelerate at 8m/s^2 and decelerate...

1. If your car goes from 0 mi/h to 40 mi/h in 5 s, what is your average acceleration? Answer in units of miles h · s 2. i think i multiply 40 times the 5 and then the answer by something else. I'm not too sure

So, I'm looking around at our Tea Party thread, and I notice that there's a lot of talk about racism. Now, this thread has only a passing connection to that one (inspiration, if you must know). I have a few questions I wanted to ask: 1. Do you believe that pro-white racism is still a relevant...

Hi I want to model a race track in CFD. This is so I can figure out the best racing line. Is it as simple as finding where the fluid flows fastest, and thus showing the best racing line? I know its a little over the top, but its for a go cart track I race on, and I want to know how to...

Music to Race to... I recently picked myself up a racing game that allows you to import your own playlists of music. Unfortunately I have found that I do not have a very wide selection of music that is very good for racing. I would like suggestions of music that would be good to listen to...

http://www.youtube.com/watch?v=koLX6-XtAnA"

It seems to me that motorbikes are built to have a low centre of gravity. I can understand this, having dropped mine twice. Once it gets away from you, there's no stopping it, and having a low CoG helps to make the bike easier to handle in the garage. However, once you're riding it, then...

Happy New Year 2010 everyone, I need your help with the determination of heat rejection to coolant from engine. I need to define this in order to finalise the geometry of a suitable radiator. I have an Excel spreadsheet from my team mate about the results obtained at the lab last year. I...

Let me start with a little background. I have a no more of an understanding of chemistry above what was taught to me in high school, and even that was a day or two ago. I spend my free time making horsepower for use in drag racing. In becoming better at what I enjoy doing, I have taken up...

Homework Statement What impact does physics facts like momentum, friction, collision, forces, inertia and second collision have on race driver crashes. Particular race: The Lexmark Indy. Particular year: None Homework Equations The Attempt at a Solution I can't seem to find a...

What are the major weightlessness discoveries in the history of the human race and how will they be of benifit to our future?

Homework Statement Car is driven on a banked circular racing track. Radius R, angle theta. a) For what speed is the track designed (if there were no friction the car would not slide) b) If the track is wet, u=0.15, what are the minimum and maximum speeds car must be driven so it stays on...

Homework Statement A top fuel drag racer with a mass of 500.0 kg completes a quarter-mile (402 m) drag race in a time of 4.3 s starting from rest. The car's final speed is 115 m/s. What is the engine's average power output? Neglect friction and air resistance. Homework Equations P = W/T...

Posted June 2024 - 15 years after starting this class. I have learned a whole lot. To get to the short course on making your stock car, late model, hobby stock E-mod handle, look at the index below. Read all posts on Roll Center, Jacking effect and Why does car drive straight to the wall when I...

Homework Statement Two cars start 10 meters up a hill. Car A has a mass of 9 grams and Car B has a mass of 2 grams. Additionally, both cars must travel the same distance to the finish line. a) If friction is ignored which car will win the race? b) If friction is not...

The enthalpy of formation of methanol (-22.7 KJ/g) is about half that of octane (-47.8 KJ/g). But methanol allows an ICE engine to achieve much greater specific powers than a comparable gasoline engine. My RC heli runs on methanol and will outperform any gas powered heli. But why is this? I...

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...

Here's a question I've been thinking about for a long time. I can't figure out the answer. How do you calculate the energy and power expanded by a horse in a given race if you know the horse's weight and the surface on which it runs? Thank you.

Gravity's Race/ Contest... Who wins? Click on attachment and post your answer:smile: You'll be amazed! Winner Willie or Red Balloon

webmaster, pls move this to applicable forum. I have much respect for members on this website and hope I may show the absolute requirement of good working knowledge of Physics..to compete successfully in Auto Racing... Many of you have expressed interest in a subject I have tried to master...

1. Homework Statement Question Details: A "Christmas Tree lighting system is used to start a drag race. The inputs to the system include a start button, a reset button, and two start line sensors. The outputs include lines for Red, Yellow, and Green lights and two Fault lights. When the...

Homework Statement Question Details: A "Christmas Tree lighting system is used to start a drag race. The inputs to the system include a start button, a reset button, and two start line sensors. The outputs include lines for Red, Yellow, and Green lights and two Fault lights. When the operator...

Homework Statement A 500 kg race car starts at rest on a curve with a radius of 50 m. If it goes 20 degrees in 4 seconds with a constant angular acceleration, what is its total acceleration at the end of this time? m=500kg r = 50 m angle = pi/9 radians time = 4...

This is so wrong. What is wrong with America? Why is racism still so widespread? The little boy in the article stating Obama should be assisinated is one answer. He's been taught by his parents. Racism is taught, and like other beliefs that are taught and are part of the culture a child...

EDIT***: sorry I figured out how to do this problem and don't need help anymore...:\ Disregard and even delete this thread. Homework Statement A race-car driver buys a car (CAR A) that can accelerate at +5.9 m/s2 . The racer decides to race against another driver with a car (CAR B) that...

Hello. Let me start by asking your forgiveness for my lack of grammatical skill. I know I need work in this subject. None-the-less, I'd like to ask a couple question concerning my dream. Please keep in mind that college is quite a ways off. I'd like to be prepared now though. Along with my...

Can someone help me with this question? I am not sure where to go with it. A speedy tortoise can run with a velocity of 10 cm/sec and a hare can run 10 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.0 minutes. The tortoise wins by a shell (20 cm)...

Not sure if this has been asked here (searched but couldn't find anything), but I thought this was an awesome question (heard in a feynman lecture) If you were communicating with an alien race, with no visual lines of communication (only audio) how would you explain left and right, so that it...

Help Please! A 1500-kg racecar can go 0 - 90 km/h in 5.0s. What average power is required to do this?

Watching CNN over the past couple of weeks, I have noticed several guests *warning* the audience that the GOP will play the "race card" in an effort to create fear amongst their constituents. These guests offered no evidence of the McCain campaign having done so yet, and cannot point to any...

http://scienceblogs.com/erv/2008/05/hahahahahahahaha_you_guys_omg.php There is an MP3 on that entry, obviously, and you should NOT listen to it, but you will. Very long intro, over a minute and a half long, so you can skip that. Also, some commercials.

If two cars were at the top of a uniform slope, and the cars are identical in every way other than their mass, which one would reach the bottom first? and why? This is an argument that lasted all the way from inverness to dundee, and still hasn't been settled, even though there are about 100...

Sorry if this has been asked before, but I tried a search and couldn't find anything... so here goes my question. Suppose I'm going to hold the 1st annual Intergalactic Space Race, but only 2 people show up to compete. One guy is in a SuperPlamasmonic X3000 Racer, capable of a accelerating...

1) On TV, people are always paired by their supposed race. It is taboo to do otherwise. 1) It appears that the notion of who is white has become more relaxed over the past decades to include almost everyone, with the one-drop rule still applying to those of black descent (TV illustrates this...

Soup Can Race: Help! Later this week my high school physics class is having the traditional soup can race. However, we have four cans to work with:1 stock can that must be the fastest, one stock can that must be the slowest, 1 modified can that must be the fastest, and one modified slower can...

Homework Statement Secretariat ran the Kentucky derby with time for the quarter mile of 25.2s, 24s, 23.8s, and 23s. Assuming that secretariat's instantaneous speed at the finish line was the same as the average speed during the final quarter mile, find his average acceleration for the entire...

Does the human race------ Have a goal, other than an ever easier lifestyle, do you agree that we will never all be equally comfortable, do you agree that the Earth does not have the resources to make it so? In another thread the ideal population for Earth was guessed to be 2 billion, we are way...