Wheel Definition and 865 Threads

In its primitive form, a wheel is a circular block of a hard and durable material at whose center has been bored a hole through which is placed an axle bearing about which the wheel rotates when torque is applied to the wheel about its axis. The wheel and axle assembly can be considered one of the six simple machines. When placed vertically under a load-bearing platform or case, the wheel turning on the horizontal axle makes it possible to transport heavy loads. This arrangement is the main topic of this article, but there are many other applications of a wheel addressed in the corresponding articles: when placed horizontally, the wheel turning on its vertical axle provides the spinning motion used to shape materials (e.g. a potter's wheel); when mounted on a column connected to a rudder or to the steering mechanism of a wheeled vehicle, it can be used to control the direction of a vessel or vehicle (e.g. a ship's wheel or steering wheel); when connected to a crank or engine, a wheel can store, release, or transmit energy (e.g. the flywheel). A wheel and axle with force applied to create torque at one radius can translate this to a different force at a different radius, also with a different linear velocity.

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  1. N

    Determine the angular velocity of the Wheel

    Homework Statement The cart has a velocity vc = 3.4 ft/sec to the right. Determine the angular speed N (positive if counterclockwise, negative if clockwise) of the wheel so that point A on the top of the rim has a velocity (a) equal to 3.4 ft/sec to the left, (b) equal to zero, and (c) equal...
  2. L

    What Force is Needed to Wheel Over an Obstacle?

    Homework Statement what magnitude of force applied horizontally at the axle of the wheel is necessary to wheel over an obstacle of height h = 0.108 m? The wheel's radius is r = 0.698 m and its mass is m = 1.71 kg. Homework Equations I know that in order to have a static equilibrium we...
  3. K

    Find the Perfect Plate for Mounting Your High-Speed Electric Motor and Wheel

    I have this electric motor (http://www.electricmotorwholesale.com/LEESON-M1120186/) directly connected to a ∅30cm wheel and I need to find a plate similar to this one...
  4. T

    G Forces experienced by human if rotated inside a giant hampster wheel

    I am working on an a project that consists of a giant wheel with a 30m radius that will be rotating at a velocity fast enough to keep a human on the inside surface of the wheel without being attached. Please refer to 30s in for reference of similar motion performed by a hamster: Can somebody...
  5. C

    How can the pebble stay on the wheel as it rolls?

    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. Show that the pebble will immediately fly off the wheel if V> sqrt(Rg) The Attempt at a Solution Hi...
  6. Y

    RE: regenrative Wheel hubs need thoughts

    Hello, I am working on a regenerative wheel hub design for an EV. This is not a regenerative braking system, nor is it a violation of the conservation of energy idea. The idea encompasses using the rotating mass of a wheel to provide a trickle return charge to the battery pack as a wheel is...
  7. G

    Turning wheel, simply angular momentum

    Homework Statement A bicycle with 0.8 m diameter tires is coasting on a level road at 5.6 m/s. A small dot has been painted on the rear tire. What is: a) the angular speed of the tire b) the speed of the dot when it is 0.8 m above the road in m/s? c) the speed of the dot when it is 0.4 m...
  8. A

    Wheel Chair Automation: Reform for Electrical Power

    i work on project to make the wheel chair works by voice commands but the harder part that i want to use mechanical one and make it work by electrical power then by voice recognition I need more information about how to reform the wheel chair to make work by electrical power ?
  9. P

    Difference Between a water wheel and a water turbine?

    Is the difference between a water wheel and a water turbine the fact that a water wheel is used to power a mechanical system where as a water turbine is connected to a generator to produce electricity? I understand that you can get undershot and overshot water wheels but do these also apply to...
  10. P

    Circular Motion, Gravity, Muddy Wheel

    Homework Statement A car is moving with constant velocity v, and has wheels of radius R. The car drives over a clump of mud and the mud with mass m, and sticks to the wheel with an adhesive force of f perpendicular to the surface of wheel. At what angle (theta) does the piece of mud drop off...
  11. R

    Accelerating a wheel of two different materials.

    We all remember the experiment where two wheels, one made of metal that is hollow and one of solid wood, of equal mass, circumference, and width are raced down a ramp, how the wooden wheel accelerates faster. If you cut the wheels in half and used one part of each to create another wheel, half...
  12. J

    Ferris Wheel question (Motion in 2d)

    1. The Ferris wheel [...] rotates counterclockwise, is just starting up. At a given instant, a passenger on the rim of the wheel and passing through the lowest point of his circular motion is moving at 3.00 m/s and is gaining speed at a rate of 0.500 m/s^2 . 2. Find the direction of the...
  13. N

    Determine the Velocity and Magnitude of Acceleration on the Wheel

    [b]1. A bicycle is placed on a service rack with its wheels hanging free. As part of a bearing test, the front wheel is spun at the rate of N = 59 rev/min. Assume that this rate is constant, and determine the speed v and magnitude a of the acceleration of point A. I have attached an image...
  14. PhizKid

    Wheel attached to a spring with teeth

    Homework Statement Homework Equations F = ma Torque The Attempt at a Solution All I want to ask is for this problem is: is there friction at ALL points along the path of the wheel because it wasn't clear from the problem. Thanks
  15. PhizKid

    What Causes a Pebble to Slip on a Rotating Wheel?

    Homework Statement only concerned with part (b) Homework Equations F = ma The Attempt at a Solution So first, just to visualize the problem a bit better, I transformed to the frame of an observer co - moving (but not rotating) with the wheel. Since the wheel is moving at constant...
  16. C

    Ferris Wheel Problem: Find r, ω, Times for 80ft Height

    Homework Statement A Ferris wheel of radius 100 feet is rotating at a constant angular speed ω rad/sec counterclockwise. Using a stopwatch, the rider finds it takes 5 seconds to go from the lowest point on the ride to a point Q, which is level with the top of a 44 ft pole. Assume the lowest...
  17. A

    Which wheel loses traction first?

    When you drive a real wheel drive too fast around a corner, the two inner wheels lose some down-force due to mass transfer. If you oversteer, does the rear inner wheel lose traction first? And then trigger the oversteer? If so, are there any equations to determine how the weight is...
  18. P

    Balancing forces on a bicycle wheel

    Hi, (this is not a homework question) If I have a bicycle with COM, M (in line with the center of the wheels, C) on an incline, angle Φ, and the bicycle is NOT moving at all because the brake is on at B. I am trying to put in the forces acting on the wheel. I figure that the weight of the...
  19. L

    Pelton Wheel: Solve 200kW Diameter Problem

    Think I posted in the wrong section previously. 1. Homework Statement The buckets of a Pelton wheel deflect a jet, having a velocity of 60m/s, through an angle of 160o. Assuming that the velocity of the jet relative to the buckets is reduced by 15% as the jet water moves over them, find...
  20. B

    Wheel dynamics: sliding and skidding

    Hi all. Reading on several books and papers, I found that the motion of a wheel moving on a flat surface are given by (assume that positive torques are counter-clockwise and the positive direction of the motion is toward the right direction): m \dot v=F J \dot ω=-rF+T for T<0, where m...
  21. L

    Radial Load, Axial Load and Toque Load in a car wheel

    This is a specific case involving a Jaguar, but any help on the correct way to find the radial axial and torque loads in a moving cars wheel would be greatly appreciated. Thanks in advance Homework Statement Estimate the worst case radial, axial and torque loads on a wheel. Mass of...
  22. N

    Rotate the wheel to a specific point

    In this wheel we have 6 pieces. The top of the wheel is the specific point. The specific point gives information of pieces. Now it gives information of the blue piece. So if i click on one of the piece for example purple, i need that purple piece to goes to the specific point and automatically...
  23. A

    Physics of the Acceleration and Inertia of a Front Wheel Drive Car

    Homework Statement I'm trying to settle an argument about front wheel drive vehicles and acceleration vs inertia and traction. Homework Equations My position is that the faster a FWD car accelerates, the more inertia causes weight transfer off of the front wheels, and onto the rear wheels...
  24. P

    Motorcycle horizontal acceleration-front wheel rise

    Motorcycle horizontal acceleration--front wheel rise The distance between the centers of the wheels of a motorcycle is 171 cm. The center of mass of the motorcycle, including the rider, is 95.0 cm above the ground and halfway between the wheels. Assume the mass of each wheel is small compared...
  25. Y

    How to calculate rollover based on angle of turn, velocity, and wheel distance

    This is for my senior design project for which we are constructing a luggage propulsion system. One of the things I have to do is calculate what is the sharpest turn possible for a given speed with a given wheel distance without it rolling over. I do not have the actual numbers yet as we are...
  26. P

    Kinetic Energy of a wheel with spokes

    Homework Statement A wheel has a thin 3kg rim and four spokes each of mass 1.2kg. Homework Equations Find the kinetic energy of the wheel when it rolls at 6 m/s on a horizontal surface. The Attempt at a Solution
  27. Z

    Wheel Rotated By Force on String.

    Homework Statement A heavy wheel (radius = 0.3 meters, mass = 12 kg) has a rope spooled around it. A woman pulls on the rope from below with a constant force. She is able to bring the wheel from rest up to 1 radian per second in 10 seconds. [Ignore friction in the hub of the wheel.] a)...
  28. A

    Understanding Franklin's Wheel: A Van de Graaff Experiment

    Hey guys, I'm new to this forum so I'm sorry if I posted in the wrong thread. So we did these experiments with van de graaff and I almost understood all of them except what seems to be "Franklin's wheel" experiment. I know for one thing that the air near the sharp points are ionized but I don't...
  29. S

    3 wheel Bicycle design: Front Axle

    I'm trying to understand the angles and force involved with my current project of building a 3 wheel front loading cargo bicycle. The current design stipulations maintain that the rear wheel always remain inline with the cargo(There are a vast majority of designs that do not adhere to this)...
  30. F

    Predicting where a roulette wheel will stop

    NOTE: I am not talking about normal roulette. Here in the midwest, some states have not approved traditional roulette, so some casinos got "clever" and made a version without the ball, just a wheel that stops on a pointer, similar to wheel-of-fortune. The wheel spins for about 1 minute...
  31. S

    Pottery wheel, angular acceleration, and required speed

    Homework Statement a small rubber wheel is used to drive a large pottery wheel, and they are mounted so that they touch. if the small wheel has a radius of 2.01 cm and accelerates at a rate of 7.08 rad/s^2 and is in contact with the pottery wheel (24.2 cm) without slipping, find the angular...
  32. S

    How Does a Wheel Move Forward Through Electromagnetic Interactions?

    Years ago I read about this but can't find any reference to it now. The underlying reason, as I remember it, is to do with the electro-magnetic force, which I think is responsible for the majority of physical interactions. But anyway: if your hand pushes on a bicycle wheel for e.g., the...
  33. D

    Relationship between velocity of wheel and car

    So I've designed a car which is powered by a falling mass. Using Energy Questions, i.e. mgh = 0.5*I*w2 I've worked out the angular velocity of the wheel; so my question is whether this represents this velocity of the whole car or do I need to multiply this value by 4?
  34. R

    What are the key considerations for designing truck wheel studs?

    I need to design studs for a front truck wheel inlcuding the pattern, position, type of stud etc. I am having trouble developing a free body diagram of the wheel studs and finding all the forces on the wheel studs. I know the following info: Max all up mass loaded...
  35. S

    Forces on Tire & Wheel: Steady Running, Acceleration & Deceleration

    I have 2 doubts . First one was to figure out how the positive and negative scrub radius will affect the dynamic toe during braking or accelerating . Then it made me realize that to understand this I will have to analyse all the forces acting on the tire (tractive forces) . Then i read up...
  36. N

    What HP Can Be Generated from a 120 CFS Water Wheel with 20-Foot Drop?

    I would like to findout what speed and HP I could get from a kind of water wheel. The unit will have a gear on top and a gear on the bottem I have over 120 cubic foot of water a second flow to play with. the containers of water will fill and lower on drive chains and rails They will loop...
  37. H

    Balance Wheel inertia/torque issue.

    I am a watchmaker and need some help with the formula and correct units to derive the Frequency of the Balance wheel. I'm am trying to prove the formula with a known Balance Wheel/Spring and Frequency but using all known values still cannot get the formula to work. When I have a working formula...
  38. S

    How does a rotating wheel apply torque/force on a ball?

    I saw a baseball pitching machine that throws baseballs at 40-70mph with one wheel... All that wheel does is rotate and as the ball touches the rotating wheel it accelerates and comes flying out of the machine at an appropriate angle.. My question is: what is the physics behind that wheel on...
  39. 2

    Circular Motion of a Ferris wheel

    Homework Statement An Ferris Wheel has a radius of 16m and rotates once every 20 seconds. a) Find Centripedal acceleration. b) Whats the effektive wheight of a 45 kg person at highest point? c) Lowest point? Homework Equations a) I tried using the a=ω2*r in a) but not sure if its right b)...
  40. S

    Magnitude of friction on the driving wheel

    After discussing this with my friend using our O level knowledge, we came to a conclusion. But we have some queries. So firstly, we have our driving wheel on the air and the engine is turned on. So the Free Body Diagram would look like this: http://imgur.com/xVk0w So in this case the net...
  41. M

    How to calculate forces on a wheel

    I have seen a lot of different formulas about the forces acting on a wheel. So now I don't know what to use. So, I have a vehicule with 4 wheels ( Ø 200 x 50mm) with a load of 900KG. I want to know 3 things: 1. What power I need to start the vehicle to move. 2. What power I need for...
  42. S

    How to calculate force on a wheel in a three gear system?

    Hi guy I try to understand how should I calculate the force on a wheel with known radius which is driven by a motor with a known torque and rational speed, in between three gears with known radiuses. Does the number of gears matter for the torque and so for the force on the wheel? (100%...
  43. S

    What determines optimal wheel size?

    As a lay person I've wondered this for a while. Obviously heavy machinery that rolls on dirt and mud needs large tire/wheel diameters and widths to spread their weight out to an acceptable ground pressure, eventually having to switch over to cat tracks when larger wheels start to give...
  44. A

    Motor drives for a satellite reaction wheel

    Hi I am working on my M.Tech project. Now i need to identify whether other than brushless dc motor and permanent magent synchronous motor , is there any other possible motor which can drive a reaction wheel in a satellite. please give suggestions
  45. T

    Acceleration of a Wheel Connected to Two Blocks with Ideal Wire

    Homework Statement (Sorry if I used any wrong term, English isn't my first language) Be A (mass M) and B (mass m) two blocks connected to each other through an ideal wire passing through a wheel (caster), each block stays at one of the side of the wheel. If we apply a force F pointing up into...
  46. P

    Automotive How does friction affect the acceleration of a rolling wheel?

    Hi everyone, Good day. for the effect of friction on wheel (all the questions are based on rolling without sliding), i know that in the case of uniform rolling, there will be no friction on the wheel. while for accelerating or decelerating case, there will be friction on the wheel (but in...
  47. L

    Fixing a Bent Bike Wheel: Is It Safe?

    I recently took a curb harder than I should've and my bike's rear tire now has a flat spot. Since my tools are currently all elsewhere I can't fix it myself. When I took it into the local bike shop the tech said that it was too badly bent to fix by simply adjusting the spokes (I agree with...
  48. A

    Force required to push wheel (not torque)

    Homework Statement How much force is required to push a wheel of radius 50 mm and moment of inertia 3.21*10^-4 kgm^2 to 20 mph in 5 seconds? The wheel has a mass of 0.29 kg. The wheel is to be pushed straight and level at its axel 90 degrees to the horizontal. Homework Equations T =...
  49. P

    Optimizing Force for Pushing Wheel over Bump

    Homework Statement You have a wheel of mass m and radius R you're trying to push it onto a block of height h that it's next to. Find the minimum force F that will let you do this. F is completely horizontal and acts upon the center of the wheel. Homework Equations I'm trying to solve...
  50. M

    Show that the wheel has constant retardation using calculus

    Homework Statement I am required to use calculus to show that a flywheel has constant retardation Prior to this I have found the initial angular velocity which is 60rad/s and the angular velocity after 2s which is 58.667rad/s Homework Equations pi=60t-(t^2)/3 dpi/dt = 60 - 2t/3...
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