Wheel Definition and 840 Threads

There is a site that explains the old problem of why the horse can pull the cart and move even though Newton's third law says every action has an equal and opposite reaction. It does it well except on this page when it summaries everything...

I am sure this is a simple problem, but I am posting this thread to make sure I understand it properly: If a motorcycle requires 3000N of force in order for it to achieve a certain speed over specific terrain and allowing for wind drag, etc. (I.E to counter the sum of the resistive forces...

My physics teacher is saying that: The friction force acting on a wheel that is spinning is = to the STATIC friction force of the rubber wheel material on the cement. That doesn't make any sense though because the static friction force is greater than the kinetic friction force so based on...

http://img98.imageshack.us/my.php?image=tricyclejz7.jpg A. If you pull to the left on the rope above, which way does the tricycle initially move? B. Why? Explain your answer above. (4 key concepts) p.s for Q A, i believe the tricycle will go backward (to the right) since the rope is...

Homework Statement In Figure 11-30(see attatched), a constant horizontal force F_app of magnitude 12 N is applied to a wheel of mass 8 kg and radius 0.70 m. The wheel rolls smoothly on the horizontal surface, and the acceleration of its center of mass has magnitude 0.75 m/s2. (a) In...

What minimum force F applied horizontally at the axle of the wheel is necessary to raise the wheel of mass M and radius R over a step of height H. A picture for this is at http://viewmorepics.myspace.com/index.cfm?fuseaction=viewImage&friendID=128765607&imageID=1460005538 The answer...

A bicycle wheel, of radius 0.330 m and mass 2.00 kg (concentrated on the rim), is rotating at 4.12 rev/s. After 48.0 s the wheel comes to a stop because of friction. What is the magnitude of the average torque due to frictional forces? First I did I = (1/2)(mr^2) = (1/2)(2kg)(0.330^2 m) =...

I have a question about this problem. A rotationally symmetric axle wheel system is smoothly joined to a fixed point O. l=distance from O to CM m=mass of axle wheel system R=Radius of wheel Is and I are the principal moments of inertia relative to CM. The axle is horizonal as the wheel...

The drawing shows a bike wheel resting against a small step whose height is h=0.120m. The weight and radius of the wheel are W = 25.0N and r = 0.340m. A horizontal force F is applied ot eh axle of the weehl. As the magnitude of F increases, there comes a time when the wheel just begins to...

I had the following question on webassign - Two objects are attached to ropes that are attached to wheels on a common axle as shown in Figure 9-55. The two wheels are glued together so that they form a single object. The total moment of inertia of the object is 40 kgm2. The radii of the...

I've been thinking about this problem for the last half hour, but can't seem to come up with a way of finding a solution. Maybe some of you can help. "George Washington Gale Ferris. Jr., a civil engineering graduate from RPI, built the original Ferris wheel. The wheel carried 36 wooden cars...

I've been thinking about this problem for the last half hour, but can't seem to come up with a way of finding a solution. Maybe some of you can help. "George Washington Gale Ferris. Jr., a civil engineering graduate from RPI, built the original Ferris wheel. The wheel carried 36 wooden cars...

A flywheel of mass 183 kg has an effective radius of 0.63 m (assume the mass is concentrated along a circumference located at the effective radius of the flywheel). (a) What torque is required to bring this wheel from rest to a speed of 120 rpm in a time interval of 34.3 s? (b) How much...

Wheel A of radius ra = 14.6 cm is coupled by belt B to wheel C of radius rc = 28.8 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 7.1 rad/s2. At what time will wheel C reach a rotational speed of 240.7 rev/min, assuming the belt does not slip? I did...

Starting from rest at t = 0 s, a wheel undergoes a constant angular acceleration. When t = 1.9 s, the angular velocity of the wheel is 6.2 rad/s. The acceleration continues until t = 15 s, when the acceleration abruptly changes to 0 rad/s2. Through what angle does the wheel rotate in the...

A rotating wheel requires 2.98 s to rotate through 37.0 revolutions. Its angular speed at the end of the 2.98 s interval is 98.8 rad/s. What is the constant angular acceleration of the wheel? First I tried acceleration = (98.8rad/s - 0 rad/s) / 2.98 s - 0s = 33.15, which was incorrect...

A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. The small wheel has a radius of 2.0cm and accelerates at the rate of 7.2rad/s^2 and it is in contact with the pottery wheel (radius 25.0cm) without slipping. Calculate: a) the...

Suppose that after a certain time t_L, the string has been pulled through a distance L. What is the final rotational speed w_final of the wheel? Express your answer in terms of L, F, I, and w_0 Extra Info: w_0 = angular velocity k = dimensionless constant m = mass r = radius Moment of...

I'm on the right track, but I'm stuck here... The radius of a Ferris wheel is 5 m and it makes one rev in 10 sec a Find the difference b/w the apparent weight of a passenger at the highest and lowest points, expressed as a fraction of his weight, W b What would the time for one rev be...

http://hosted.ap.org/dynamic/stories/W/WHEELCHAIR_SHOOTER?SITE=CAANG&SECTION=HOME&TEMPLATE=DEFAULT It's terrible and sad how people take advantage of helpless handicap people:biggrin:

As someone who regretfully has never studied physics, I am at a loss as to how to begin to evaluate the choice of wheel radius for a gravity powered car I am building for a local gravity race. How would one go about picking a wheel radius that would maximize the speed of the vehicle?

Why is it that everytime i decide to stick around after jeopardy, i get to be fascinated at the stupidity of some wheel of fortune contestants. When they have a very long puzzle... especially with a jackpot thingy... why is it that they solve soooooo early in the round? Theres maybe... 1 in 20...

a wheel or radius r rolls along a horizontal straight line.Find parametric equations for path traced by point P on the circumference of the wheel somebody pls help. thanx

A solid wheel on a game show is given an initial angular speed of 1.25 rad/s in the counterclockwise direction. It comes to rest after rotating through 3/4 of a turn. Find the torque exerted on the wheel given that it is a disk of radius 0.73 m and mass 6.4 kg. I got 0.5654 as the answer...

A grinding wheel is in the form of a uniform solid disk of radius 7.01 cm and mass 1.90 kg. It starts from rest and accelerates uniformly under the action of the constant torque of 0.591 Nm that the motor exerts on the wheel. (a) How long does the wheel take to reach its final rotational...

I'm trying to figure out the following problem but I don't know where to begin: Two wheels of diameter 0.78m are attached to opposite ends of an axle of length 1.6m. The wheels roll around a circular track of inside radius 9m. a) Through what angle around the circular track must the axle...

Invented and patented by a twelve year old boy. http://www.memsnet.org/news/1132507379-0/

Why does a wheel move (translate) when it rotates? I mean when you exert a force somewhere on the wheel, it will produce a torque that make it rotate. Now assuming the wheel is in contact with the ground, the wheel will then exert a force on the ground and the ground will exert a counterforce on...

This is the PROBLEM: Flinstone has a problem too. He built a beam mover, described below (on the attachment, DOC file, look down), but can't figure it out. Perhaps you can help. Two identical wheels and axles sets were carved from from logs. In each set, the 50 cm diameter wheels and the 14...

my teacher said my answer is wrong but i cannot figure out why there is a ferris wheel. a rider in the ferris wheel is 35kg. the radius of the ferris wheel is 12m. it asks what is the magnitude of the force does the seat exert on the rider when he is halfway between the top and the bottom...

A 6.0cm diameter wheel is rolling along at 20 m/s What is the speed of a point at the front edge of the wheel? Im kinda lost here. Tha answer given in the back of the book is 28.3 m/s. I have no idea how to do this problem, though I know i must be missing something simple. I found...

Alright, well, I tried and tried to solve this problem, but seemed to be getting no where. A car travels at 1.70 m/s. The driver accelerates and increases the speed to 10.7 m/s in 2.20 s. If the radius of its wheel is 0.590 m, calculate the angle turned by the wheel during this time.

A car wheel turns through 277 degrees in 10.7 s. Calculate the angular speed of the wheel. Well, i know the Angular Accelereartion is equal to the change in angular velocity divided by the time required to make that change. So should i first convert 277 degrees to radians?.. which is...

A wheel of radius 0.2m is mounted on a frictionless horizontal axis. The rotational inertia of the wheel about the axis is 0.05kg(m^2). A massless cord wrapped around the wheel is attached to a 2kg block that slides horizontally. If a horizontal force of magnitude P=3N is applied to the...

A wheel is rotating freely with an angular speed of 800 rev/min on a shaft whose rotational inertia is negligible. A second wheel, initially at rest and with twice the rotational inertia of the first, is suddenly coupled to the same shaft. What is the angular speed in rev/min of the resultant...

Why are Bicycle wheels the same size? Is it because it is easier to manufacture and maintain or does having same wheel sizes in the front and back offer added stability when compared to having a bigger wheel at the back (like the early models)?

The figure shows a bicycle wheel resting against a small step whose height is h = 0.110 m. The weight and radius of the wheel are W = 29.0 N and r = 0.350 m. A horizontal force F is applied to the axle of the wheel. As the magnitude of F increases, there comes a time when the wheel just begins...

Hi, I'm having difficulty figuring out the radius for this problem, I need the radius in order to figure out the kinetic energy: A wheel has a thin 2.8 kg rim and four spokes each of mass 1.4 kg. Find the kinetic energy of the wheel when it rolls at 6 m/s on a horizontal surface. I know...

This problem is due on my webassign homework in 3 hours and I can't get it right! Calculate the net torque about the axle of the wheel shown in Fig. 8-39. Assume that a friction torque of 0.43 mN opposes the motion and that F = 26. The picture is here...

Motorcycle Wall of Death Some pointers would be greatly appreciated please. A motorcycle is slowing down, but maintaining its height on a 'wall of death' (a vertical cylinder where the motorcycle 'drives' around the inner circumference as a stunt). A spectator takes timings in...

circular motion ferris wheel The Ferris wheel in the figure , which 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...

The height (in metres) of a rider on a ferris wheel after t minutes can be described by the function y=67sin[(pi/15)x -30]+70 a) what is the diameter b) where is the rider at x=0? explain the significance c)how high off the ground is the rider at the top of the wheel? d) at what times will...

A simple wheel has the form of a solid cylinder of radius r with a mass m uniformly distributed throughout its volume. The wheel is pivoted on a stationary axle through the axis of the cylinder and rotates about the axle at a constant angular speed. The wheel rotates n full revolutions in a...

I am doing a project in Design & Technology and intend to design a product that is to be used by Playstation 2 (or other consols) users. I have a few questions, which I would be very grateful for if I get a few replies: Do you have a Steering wheel and pedal that you use to play car games with...

What if the center part of a bicycle wheel was spinning at almost the speed of light. What would keep the outside part of the rim from spinning faster than the speed of light?

At time t=0 a grinding wheel has an angular velocity of 29.0 rad/s. It has a constant angular acceleration of 34.0 rad/s^2 until a circuit breaker trips at time t = 2.30 s. From then on, the wheel turns through an angle of 434 rad as it coasts to a stop at constant angular deceleration. now...

Q. A chemistry student with a mass of 75 kg is riding a steadily moving Ferris wheel. When she is at the top of the Ferris wheel, the normal force from the seat on to her body has a magnitude of 556 N. Q. What would the normal force be on the student at the top of the wheel if the wheel's...

A wheel on a game show is given an initial angular speed of 1.3 rad/s. It comes to rest after rotating through 3/4 of a turn. Find the average torque exerted on the wheel given that it is a disk of radius 0.80m and mass of 6.4 kg. I worked the matching problem in the book and got the...

Consider a bicycle wheel that initially is not rotating. A block of mass m is attached to the wheel and is allowed to fall a distance h. Assume that the wheel has a moment of inertia I about its rotation axis. Consider the case that the string tied to the block is attached to the outside of...

A bike wheel, of mass 1.36 kg is placed at the end of a rod 0.530 m in length, which can pivot freely about the other end. The rod is of negligble mass. The wheel is turning rapidly such that it has an angular momentum of 10.8 kgm^2/s. At what angular speed does the wheel revolve horizontally...