Wheels Definition and 209 Threads

I was thinking about it, and the only thing I could come up with is that it reduces friction with the surface the object is sitting on and perhaps it distributes weight evenly?

1.ZapperZ 2.Junglebeast http://img37.imageshack.us/img37/246/p9031294.jpg 3.Edward http://img266.imageshack.us/img266/1535/1001344jpgwheels.jpg 4.Cyrus http://img38.imageshack.us/img38/4954/wheelm.jpg 5.Andre 6.Moose 7.Brewnog 8.Borek 9.Matthyaouw...

Why is breaking with the wheels turning more effective than when the wheel locks up? Is it because there is more friction between the breaks and the disks (or drums) than there is between the road and tyre, or am I missing something.

Wheels Wheels are the theme this week. Sorry it's late. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In case there's a gray area, or you're not sure if the picture is suitable, check with me first. 2...

Anyone who's looked at a spinning car wheel or fan notices that sometimes it looks as if the wheel/fan is spinning backwards. I was once told that this is because of the fact that the light shining on it, coming from an electric light source, turns on and off at a certain frequency (~50Hz) and...

Hi, I'm building a simple 2D simulator for mobile robots, and I'd like to be able to determine the translation and rotation of a 2-wheeled simulated robot based on simple kinematics (no forces, friction etc). So, given these: - angular velocity of each wheel (rad/s) - wheel radius (m) -...

Rear wheels' rigid positioning parallel to the longitudinal axis of the vehicle somehow makes the vehicle (two as well as a four wheeler) go around a curve when steered. If the rear wheel is hinged to the frame making deflection about the vertical axis possible (Like the wheels in TV stands)...

I know that moving things is a lot easier with wheels, and I suspect it has something to do with the friction on the wheels versus the friction on just a regular sliding object. But how do you prove, with the laws and equations of physics, that it takes less force to move something when there...

hello everyone.i'm a disabled; by a surprise stroke at 49 forcibly retired54 year old guy who has been able to figure out or understand almost everything related to home construction in my 25 years as home owner having built on 640 sq ft single handedly from the ground up to...

To determine the location of the center of mass of a car, the car is driven over a scale. When the front wheels are over the scale, the weight recorded by the scale is 5.70 x 103 N. When the rear wheels are over the scale, the scale reads 6.30 x 103 N. The distance between the front and rear...

Hi, I'm new here. I've something in mind for sometime now, that is what happen if a car has its front and rear wheels turning at different speed? Say, the front wheels can cover 100km/hr while the rear ones can only cover 75km/hr. What happen to the car average speed (I guess its less than...

Well, we have a Physics project which requires us to build a car and power this using energy provided by a mousetrap. We may not add other energy sources to power the car; we can only use the mousetrap provided to power the car. Homework Equations Now, thinking about strings and...

why do smaller wheels on a car...? I recently had to do a science lab for school, and my guiding question was 'Does the size of a car’s wheel affect the acceleration rate?' when i completed this lab, my results were that a smaller wheel affects the acceleration rate more then a bigger wheel...

On a Go-Kart you have two independent steerable front wheels that can be adjusted to steer at different rates. What I am trying to figure out is a formula I can use, converted to degrees or MM, to give the turn angle each wheel must achieve to turn the kart and not create mutual drag and...

i apologize if this question is very basic. What is a reaction/ momentum wheel? I've been doing some research for a cubeSAT project, and these have popped up often in terms of attitude control. I really don't understand what a flywheel is, but if i knew that then maybe a reaction wheel would...

We're trying to fit spherical wheels to move a prototype vehicle rather than the circular one for our project. The advantages we see are greater acceleration due to smaller M.I (for the same mass of the wheels) and easy parking. I suggested the conventional electric motor principle for...

[SOLVED] Two wheels and angular acceleration Homework Statement In the figure below, wheel A of radius rA = 11 cm is coupled by belt B to wheel C of radius rC = 25 cm. The angular speed of wheel A is increased from rest at a constant rate of 1.6 rad/s2. Find the time needed for wheel C to...

Hi, I'm hoping you kind folks can help me out. I'm a motorcycle racer, and I'm trying to find a *simple* formula for calculating how much mass addition/reduction to a wheel will increase/decrease the force required to change the direction of the motorcycle when at speed. Basically, to turn a...

A bicycle has wheels of radius 0.33 m. Each wheel has a rotational inertia of 0.082 kg* m2 about its axle. The total mass of the bicycle including the wheels and the rider is 74 kg. When coasting at constant speed, what fraction of the total kinetic energy of the bicycle (including rider) is the...

I wasnt sure where to post my question. Here goes: I have a car with 4 wheels and one motor. The motor drives an axle connected to the back wheels. The total mass of the car is 1000kg Each wheel weighs 20kg and is a solid cylinder The effective frictional force is 0.2 The radius of the...

Anyone know what a car's transfer function is, ie the dynamic response written as differential equations and diagrams, so a controller can be designed for it (as in the cruise control feature in some luxury cars)? I mean, many of us are familiar with the torque curve, ie engine torque as a...

1.A mechanic jacks up a car to an angle of 7.0° to change the front tires. The car is 2.90 m long and has a mass of 1180 kg. Its center of mass is located 1.12 m from the front end. The rear wheels are 0.40 m from the back end. Calculate the torque exerted by the car around the back wheels...

why don't textbooks ever give the stress/tension of the spokes on a wheel? How would you find this?

1. An airliner lands with a speed of 45.0 m/s. Each wheel of the plane has a radius of 1.25 m and a moment of inertia of 110 kg·m2. At touchdown the wheels begin to spin under the action of friction. Each wheel supports a weight of 1.40 x 10^4 N, and the wheels attain the angular speed of...

My understanding of 'camber thrust' is that when a wheel rolls with it's axle not parallel to the ground, it will act as a rolling cone and try to follow an arc around the point at which it's rotation axis intersects the ground. I've seen this effect on flat ground for instance being able to...

An object has rotational inertia I. The object, initially at rest, begins to rotate with a constant angular acceleration of magnitude alpha. What is the magnitude of the angular momentum L of the object after time t? ___ So I know that I have to find angular velocity and use the equation...

[b]1. [b]1. The rear wheels of a tractor are 4 ft in diameter and turn at 20 rpm. a. How fast is the tractor going (ft. per sec.)? b. The front wheels have a diameter of only 1.8 ft. What is the linear velocity of a point on their tire treads? c. What is the angular velocity of the front...

HI i live in South-Africa and a few of us guys have been fighting on a car club about something... I say that if you get 2 of the same cars (Ford Fiesta ST150) which has a standard of 17" wheels. Now you keep the same wheel on the one car and on the other you change the wheel to a larger wheel...

I'm interested in the physics behind racing Hot Wheels cars. When you release the cars from an incline, what makes some cars go faster than others? What would be the most important factor of a fast car (ex. weight, aerodynamics, etc.)? How could I modify a car to go faster? Thanks!

Hello Everyone, My friend and I were having a discussion of why car wheels would naturally return back to a forward position if one doesn't hold on to the steering wheel. It could be that its just the car turning to match the direction of the wheel, but I think the wheels turn more to match...

So I have two (somewhat) related questions. 1) Why is it wheel rims (or spokes) sometimes appear to spin backward? Everytime I see this it drives me crazy. I just cannot figure out how a wheel spinning real fast in one direction appears to be spinning real slow in the other direction. 2)...

Hi, My friend and I are doing a physics project that analyzes movie physics and we have a quick question. In Home Alone 2, the kid ties a doorknob to a tool chest on wheels that is a floor up. The bad guys pull on the doorknob and the tool chest starts falling down the stairs. How would we...

This is a clip of a "cat wheel," a feline version of a mouse wheel. I had several mice years ago, and they couldn't seem to get enough of their wheel. What is the appeal of these wheels to animals? Anyways, it's also a cute clip, and if you're a cat lover, you know you want one.

A few weeks ago I discovered http://www.erikbrinkman.com/scroller/" over eleven years ago, why isn't it used for anything? Or if it is, what?

Homework Statement A cart of mass M rides on four frictionlesly mounted wheels of radius a and mass m'. The top of the cart is sloped at an angle alpha horizontally and a mass m is suspended from the top of the slope of force constant k. m slides without friction up or down the slope. a)...

Homework Statement A wheel of radius R rolls along the ground with velocity V. A pebble is carefully released on top of the wheel so that it is instantaneously at rest on the wheel. (a) Show that the pebble will immediately fly off the wheel if V> sqrt(Rg) (b) Show that in the case where V<...

In the early days of Global Warming, the "capo di tutti global warming capi", Stephan Schneider, made his world famous public appeal to commit noble cause corruption: http://stephenschneider.stanford.edu/Publications/PDF_Papers/DetroitNews.pdf It's likely that this appeal is one of the...

So I am a person sitting on a chair that has wheels. Now, the question is - can I push the chair when I am sitting on the chair and have nothing to push against? [other than the chair] Whenever i try to push against the chair, friction with the ground seems to pull it back. According to...

Homework Statement A car tire is 65.0 cm in diameter. The car is traveling at a speed of 20.0 m/s . What is the tire's rotation frequency, in rpm? What is the speed of a point at the top edge of the tire? What is the speed of a point at the bottom edge of the tire? Homework...

Hi. I did a 5 part problem and I just want to know if I did it right or if I'm on the right track. Please help. Thank you. The problem is as follows: Two identical grinding wheels of mass m and radius r are initially spinning about their centers. Wheel A has an intial angular speed of w...

can anyone show me how to solve this problem? a cart on wheels with a mass of 250 g has a motor driven propeller with a force P of .3 N, and it moved down an incline of 30 degrees with an acceleration of 3.5 m/s^2. What is the force of friction ? determine coefficent of friction

hi, i am doing a level physics in the uk(first year of the 2), we are doing this big coursework on the materials, where each member of the class is supposed to choose a material and make a big report on it, with plan, report, predictions, and in the end we have to have a microsoft presentation...

A 50kg rider on a moped of mass 75kg is traveling with a speed of 20 m/s. Each of the two wheels of the moped has a radius of 0.2m and a moment of inertia of 0.2 kg*m^2. What is the total rotational kinetic energy of teh wheels? KEr = 1/2Iw^2 = 1/2(.02)(20)^2 = 4 Two wheels = 2...

An automobile with four wheel drive has mass of 1000kg. Its weight is evenly distrubuted among the four wheels, whos coefficient of static friction with the road is 0.80. If the car starts from rest and the road is horizontal calculate the maximum acceleration it can attain without spinning its...

This is my first post Sorry that it has to be such a stupid question... How does one draw a worm gear along with its worm wheel? I know that a worm gear is made up of a helix but I sure hope that I do not have to draw that! Is there a much simpler representation?

Is it possible for a wheels forward velocity to increase when separated from a moving vehicle? If so please describe what makes this possible?

trying to build an rc car but stuck on how to make sure its wheels are aligned properly so that it can travel in a straight line. Any tips will be welcomed. thanks.

For my project i am involved in called scrambler I have designed a wooden cart to carry my egg one meter and then stop, but i am having trouble connecting my wheels and circuts to the base? Help!

I have encountered a question regarding a plank shifting in simple harmonic motion on top of two rotating wheels, rotating in exact opposite directions with the same angular velocities and the question requires me to determine the frequency of oscillation, which has got me stuck. I proved that...

A cyclist starts from rest and pedals such that the wheels of his bike have a constant angular acceleration. After 10.0 s, the wheels have made 54 rev. What is the angular acceleration of the wheels? Use units of "rad/s\^{}2". If the radius of the wheel is 36.0 cm, and the wheel rolls without...