Wheel Definition and 840 Threads

1. I do not even know where to start here, any help is much appreciated A flywheel (a) with a mass of 100 kg and radius of gyration 1200mm rotates at 150 revs min^-1 (clockwise). The kinetic energy of this flywheel is to be reduced by 20% by impacting it with a second flywheel (b) rotating at...

4. A train is moving with a speed of 31.4 meters second . One of the major wheels of the locomotive has a radius of 0.5 meters. (a) How many revolutions does the wheel make in a second if the center of the wheel advances by 31.4 meters? (b) A piece of chewing gum, weighing 20.0 grams, is...

Homework Statement Motorcycle is accelerating from the rest with a constant acceleration a = 2 m/s². We are observing its front wheel (see picture) after a time t = 10 s. This wheel is not slipping while accelerating. How much are velocities of points A, B, and C on rim of wheel? How much...

Homework Statement Motorcycle is accelerating from the rest with a constant acceleration a = 2 m/s². We are observing its front wheel (see picture) after a time t = 10 s. This wheel is not slipping while accelerating. How much are velocities of points A, B, and C on rim of wheel? How much...

Homework Statement A wheel rotating with a constant angular acceleration turns through 22 revolutions during a 9 s time interval. Its angular velocity at the end of this interval is 15 rad/s. What is the angular acceleration of the wheel? Note that the initial angular velocity is not...

I have spent a while trying to work out a simple equation to give me the driving force of the engine in a car using the inputs: Power, wheel radius and rpm but when I put in real numbers from a production car, I get low values of 2197N. The equation I have derived is: Driving force =...

Homework Statement A Ferris wheel with radius R turns with a constant angular velocity \omega. A child rides the Ferris wheel with a fresh ice cream cone. When the child reaches an angular position \varthetas [see diagram below], she is so distracted that she tips the cone and drops the nice...

What is the magnitude of the acceleration of a speck of clay on the edge of a potter's wheel turning at 63 revolutions per minute if the wheel's diameter is 34 cm? Just give 2 sig figs.I understand that to find VELOCITY ofo the speck of clay, I'd need to find the circumference of the circle...

Homework Statement How many revolutions per minute would a 15.1 m diameter Ferris wheel need to make for the passengers to feel "weightless" at the topmost point of the trip? Homework Equations The Attempt at a Solution I assume this problem has something to do with finding...

Homework Statement While at the county fair, you decide to ride the Ferris wheel. Having eaten too many candy apples and elephant ears, you find the motion somewhat unpleasant. To take your mind off your stomach, you wonder about the motion of the ride. You estimate the radius of the big...

On a Ferris Wheel 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 550 N. a) What is the magnitude of the normal force on her body when she is at...

Hi all, I am trying to calculate the the torque of a system which uses various size wheels to transfer power. Explained: A motor, of 100Nm torque, 40000 rpm, has a shaft of 7mm diameter in contact with a wheel 20mm in diameter. This wheel is in contact with a 15mm wheel. I need to...

Homework Statement 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 567 N. What is the magnitude of the normal force on her body when she is at...

Homework Statement A bicycle is rolling down a circular hill that has a radius of 9.00m. The angular displacement of the bike is 0.960rad. The radius of each wheel is 0.400m. What is the angle (in radians) through which each tyre rotates ? Notes on question : - wheels are in rolling...

Homework Statement A wheel of radius r is rolling along a muddy road with speed v, and particles of mud are being continuously thrown off from all points of the wheel. ignoring air resistance, what is the trajectory of a mud glob thrown off the wheel when it is at angle (theta) to the...

How is a sliding wheel is opposed by static friction? Static friction acts only when the body is about to move. My point is if the wheel is has a linear velocity and angular velocity than kinetic friction should act on the body rather than static friction.

Hi guys, I am a complete physics dunce so go easy on me, I can wrap my mind around the basic concepts but I need help with this particular proble,. What I'm trying to do is figure out how much torque is lost or gained by changing wheels on a car. I assume we need to ignore the front two...

Hello! Me and my team are working on a two-wheel simple robot having two motors and 12v 1.5amps supply for a small intra-college robo-race. The wheels are 10cm diam. and we have a cylindrical body between the two wheels with 8cm diam. The setup is all wired, nothing wireless( with the remote...

I'm designing a paddle wheel drive house boat and need to do some calculations to see if the parts I have on hand can do the job. Paddle wheels will be 6' dia. with 8 paddles by 3' long . Paddles will be 3' long by 10" and will have the tops of the paddles submerged by 2" to 3" when the...

Hi all! I've got a problem which I can't solve for almost a week :-/ It's about simulating a car with some physics added. The things is that I cannot calculate the wheel angular velocity right. Let's assume that a car has no velocity and is using 7300 N (1st gear, 1000 rpm) of force on the...

Homework Statement A woman rides on a Ferris wheel of radius 16m that maintains the same speed throughout its motion. To better understand physics, she takes along a digital bathroom scale (with memory) and sits on it. When she gets off the ride, she uploads the scale readings to a computer...

Homework Statement A rotating wheel with radius 40 cm and a connecting rod PQ with length 1.2m. The pin P slides back and fourth along the x-axis as the wheel rotates counterclockwise at a rate of 360 revolutions per minute. Find the angular velocity of the connecting rod, da/dt, in radians per...

Homework Statement [Let a Ferris wheel exist.] The wheel carries 36 cars, each holding as many as 60 passengers of 70kg mass, around a circle of radius R = 38m. The mass of each car is about 1.1e4 kg. The mass of the wheel's structure as about 6.0e5kg, which was mostly in the circular grid...

At t=0 at grinding wheel has an angular velocity of 24.0 rad/s. It has a constant angular acceleration of 30.0 rad/ s2 until circuit breaker trips at t=2.00s. From then on, it turns through 432 rad as ut coasts to a stop at constant angular acceleration. a) through what total angle did the wheel...

Hello: If a person rides on a wheel that has the same speed throughout rotation. Does this mean that magnitude of angular velocity is same throughout rotation? I think if the wheel has the same speed, then the centripetal force is equivalent throughout rotation. Now, the person decides...

Fairgoers ride a Ferris wheel with a radius of 5.00 m . The wheel completes one revolution every 31.0 s If a rider accidentally drops a stuffed animal at the top of the wheel, where does it land relative to the base of the ride? (Note: The bottom of the wheel is 1.75 m above the ground.)...

SOLVED Given initial angular velocity of wheel, find revolutions to rest Homework Statement As a result of friction, the angular speed of a wheel changes with time according to d \vartheta / dt = 4.1e-.088335775t where the initial angular velocity is 4.1 rad/s. Find the number of...

Hi all, Just Wondering quickly, do the static hub caps on a Formula one car(say Brawn GP) bulge out slightly or are the flat and flush with the wheel? If they do bulge out, why does this produce less drag? Thanks Sean

Homework Statement A mass of 0.8kg is attached to a massless string that passes over a pulley and is wrapped around a wheel of radius 0.5m, and rotational inertia 1.0 kgm^2. The wheel can rotate freely. The mass is initially held stationary at a height of 1.5m above the ground. When the mass...

How would I calculate the speed of a spinning wheel (using forces in Newton and anything else required)?

[Solved] Wheel touching a kerb just about to lift. What are the forces on the wheel? Homework Statement In order to lift a wheel over a kerb of height h, a minimum force F is be applied at the axle. The radius of the wheel is R. Draw all the forces on the wheel then find its weight...

Homework Statement A wheel with rotational inertia I = 0.5MR^2 about its central axle is set spinning with initial angular speed w and is then lowered onto the ground so that it touches the ground with no horizontal speed. Initially it slips, but then begins to move forward and eventually...

Homework Statement A grinding wheel in the shape of a solid disk is 0.240m in diameter and has a mass of 2.50kg. The wheel is rotating at 2050rpm about an axis through its center. What is its kinetic energy? How far would it have to drop in free fall to acquire the same amount of kinetic...

Homework Statement A device consists of eight balls each of mass 0.5 kg attached to the ends of low-mass spokes of length 1.8 m, so the radius of rotation of the balls is 0.9 m. The device is mounted in the vertical plane. The axle is held up by supports that are not shown, and the wheel is...

I tried a google search on the question I am about to ask but i get everything except for what i want... :( I have 2 situations: i have 2 16Tonne weights connected to each other via cable, and then hung around a wheel so that the 2 weights hang side by side with no movement. If i then...

Ferris wheel question! Homework Statement A common amusement park ride is a Ferris wheel (not drawn to scale). Riders sit in chairs that are on pivots so they remain level as the wheel turns at a constant rate. Assume the usual coordinate system (x to the right, y up, z out of the page...

Ok i am not good with physics and these are some review problems for my test coming up. Please help. At time t1 = 0 an electric grinding wheel has an angular velocity of 28.0 rad/s. It has a constant angular acceleration of 32.0 rad/s2. At time t2 = 2.20 s a circuit breaker trips, and the...

Homework Statement A wheel of radius R and mass M is dragged over a step of height h by force F applied horizontally at its center. What is the maximum value of F required so that the wheel climbs over the step? (Hint: wheel climb is equivalent to a rotation around the point of contact with...

http://img13.imageshack.us/img13/4697/masteringphysicsq1gwk.jpg I got the first two, but I'm trying to figure out what to do for the others, do i take figure out the net force at the top and divide it by the weight force on ground? e.g i figured out at top the net force = 600N (just an...

Homework Statement I have a vehicle traveling at 180 ms^-1, weighing 2000kg. I need to calculate the maximum stress that the wheel is likely to sustain if it hits a solid, immovable object at the above speed, so that i can successfully design a wheel which won't go beyond its yield strength...

hey guys ^_^ could anyone please explain to me how exactly these work? i mean, i know its due to conservation of angular momentum that allows spacecraft s to rotate in the opposite direction of the momentum wheel acceleration. but could anyone perhaps go through some equations of the...

Homework Statement A Ferris wheel rider moves in a vertical circle of radius r at constant speed v. Therefore, he experiences a centripetal acceleration a. Homework Equations Is the normal force that the seat exerts on the rider at the top of the circle less than, more than, or the same as the...

Homework Statement You have your bicycle upside-down for repairs. The front wheel is free to rotate and is perfectly balanced except for the 16 g valve stem. If the valve stem is 34 cm from the rotation axis and is located 32 degrees below the horizontal, what is the resulting torque about the...

Homework Statement Basically i need to find the braking distance and time for the deceleration of a vehicle for the following conditions, using a parachute using a parachute, and wheel brakes does anyone know of a suitable formula to calculate this? Homework Equations...

Homework Statement There is a wheel (attached to an axel and the weight and the center of mass of both wheel and axel is known). There is a defined constant force (F) acting on the wheels center of mass and the friction force is also known (the coefficient of friction and the normal...

Homework Statement A thin 7.0 kg wheel of radius 32 cm is weighted to one side by a 1.0 kg weight, small in size, placed 25 cm from the center of the wheel. (a) Calculate the position of the center of mass of the weighted wheel. *edit* found the CM, its 3.125cm from the center *edit* (b)...

How much rake and trail do need to use in a design? My design is essencially a bicycle front end. The various forces and changing dihedral angles are making this a real challenge. I don't know where to start. Some of the forces involved are the normal and lateral force exerted by the wheel...

Homework Statement A wheel 31.8 cm in diameter accelerates uniformly from 242 rpm to 380 rpm in 7.66 s. How far will a point on the edge of the wheel have traveled in this time? Homework Equations angle = initial angle +angular velocity(t) + .5(angular acceleration)(t) w=initial...

Homework Statement A wheel with mass m, inner radius r and outer radius R is placed on a slope. The slope has angle θ related to horizontal. When the wheel is affected by a constant, known torque Tau in the centre of mass, the wheel begins rolling uphill...

Homework Statement While at a country fair, you decide to ride the Ferris Wheel. Having eaten too many candy apples and elephant ears, you find the motion somewhat unpleasant. To take your mind off your stomach, you wonder about the motion of the ride. You estimate the radius of the big...