Angular velocity Definition and 866 Threads

Consider an electric dipole located in a region with an electric field of magnitude E pointing in the positive y direction. The positive and negative ends of the dipole have charges + q and - q, respectively, and the two charges are a distance D apart. The dipole has moment of inertia I about...

Homework Statement The following data are for the angular displacement of the knee in cycling measured in degrees. Using radian measure, compute the angular velocity and acceleration when the knee angle is 119.1 degrees. The sampling frequency was 50 Hz. What is a problem you may...

Hi, I need to resit some exams and I'v been having difficulty trying to solve this problem. Estimate the velocity and angular velocity of an empty pipe of mass (m)=1000kg, Diameter (d)=10mm, shell thickness (h)=1mm at the bottom of a slope of angle \theta=45^{}o and path length L=5000mm on...

Hi I am having trouble with a problem that involves angular velocity. The problem states: The rigid object shown is rotated about an axis perpendicular to the paper and through point P. The total kinetic energy of the object as it rotates is equal to 1.4 J. If M = 1.3 kg and L = 0.50 m, what...

Homework Statement Homework Equations w = 2PI f v = wr Time = 2PI R/V The Attempt at a Solution w = (2000/PI x 60) x 2PI = 66.66 Radians/Sec V = wr = 66.6 x 300 = 19998 ( Is this velocity of the winding drum) 19998/200 = 99.99 ( Velocity/200 reduction gearbox...

[SOLVED] Angular velocity Homework Statement The angular acceleration of a flywheel of a generator is given by a(t) = 6bt - 12ct2 What is the angular velocity at t when the initial velocity is w0? The Attempt at a Solution w = w0 + at = w0 + 6bt2 - 12ct3 This is wrong...

Homework Statement A 5.0 kg, 60-cm diameter disk rotates on an axle passing through one edge. The axle is parallel to the floor. The cylinder is held with the center of mass at the same height as the axle, then released. a. What is the cylinder's initial angular Acceleration? b*. What is...

[SOLVED] another angular velocity problem A 170-lb wide reciever jumps vertically to catch a pass and is stationary at the instant he catches the ball. At the same instant he is hit at point p by a 180-lb linebacker moving horizontally at 15 ft/s. The wide recievers moment of inertia about his...

[SOLVED] dynamics angular velocity question I've tried this problem with a simple way of kinetic energy and potential, but I am now where close to the answer of 11.1. There must be a way of doing it I don't know of. The .1 kg slender bar and .2 kg cylindrical disk are released from rest...

Hullo was wondering if anyone could help me. In dimensional analysis using then buckingham pi theorum, I'm not sure how to express an angular velocity in terms of basic dimensions (i.e M (mass), L (length), T(time), \Theta (temp). I know an angular velocity is revs/s or rad/s so its going to...

The angle through which a rotating wheel has turned in time t is given by \ theta = a t - b t^2+ c t^4, where theta is in radians and t in seconds. What is the average angular velocity between t = 2.0 s and t =3.3 s? If a = 9.0 rad/s, b = 16.0 rad/s^2, c = 1.6 rad/s^4 Homework Equations...

Homework Statement A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means of storing energy in the form of rotational kinetic energy and are being considered as a possible alternative to batteries in electric...

Homework Statement Hi, I would just like to know if I'm on the right track with this one. I have two identical particles with a radius R and mass M. One is at rest and the other moves directly down with a velocity v0. The second particle hits the first particle slightly offset, so that the...

Homework Statement The 15kg plate shown above is able to roate on its axle which is supported on the the journal bearings at A and B. A bullet is fired into the plate providing it with an initial angular momentum of 9kgm/s. Find the angular velocity of the plate when it has rotated thropugh...

Homework Statement A uniform solid sphere of mass M and radius R hangs from a string of length R/2. Suppose that the sphere is released from an initial position making an angle of 45 degrees with the vertical. Calculate the angular velocity of the sphere when it swings through the vertical...

A rod of mass M, length L, and uniform density and thickness swings around a frictionless pivot at one end of the rod; the other end is free. The rod is held at angle θ below the horizontal and then released with no initial angular velocity, ω0=0. Find the linear acceleration a of the rod's free...

[SOLVED] Unstretched Spring and Angular Velocity Problem Homework Statement A disk of mass 73 kg is held by a spring of unstretched length 88 cm and stiffness constant 430 N/cm, and rests on a frictionless table. It is then orbited in a circle at angular velocity .675 rad/s. By how...

Homework Statement the problem is: A 3.0 m diameter merry go round with rotational inertia 120kgm^2 is spinning freely at 0.50 rev/s. Four 25kg children sit suddenly on the edge of the merry go round. a) Find th new angular speed, and b) detrmine the total energy lost to friction between the...

Homework Statement A spool of thin wire rotates without friction about its axis. A man pulls down on the wire with force of 14.9N. How long does it take to increase the angular velocity of the spool from 11.0rad/s to 35.0rad/s? Icm = 0.490kg*m^2 Inner radius, r = 0.280m Outer radius, R =...

A wheel turns with a moment of intertia of 16.0kg m^2 and has 10m N applied to it. if it starts from rest calculate the angular velocity. Also what is the kinetic energy 10seconds later? The wheels angular velocity i used T=IA, and solved for Angular velocity solving for a i got...

Homework Statement What is the angular velocity magnitude of member BC? Problem Figure Attached: Homework Equations V = w r Va= Vb + Va/b The Attempt at a Solution I thought the problem would be simple as I could use v=w r to calculate the velocity and then use the equation of relative...

Homework Statement Close call! A fast car barely misses a man by 3 meters, while traveling at 30 meters per second. The man's head is tracking the car. What's his head's angular speed when the car is 3 meters away? Homework Equations Angular velocity = change in angle / change in time The...

[b]1. A top is a toy that is made to spin on its pointed end by pulling on the string wrapped around the body of the top. The string has a length of 64cm and is wound around the top at a spot where its radius is 2.0 cm. The thickness of the string is negligible. The top is initially at rest...

What is the angular velocity of the sun? thanks

1. For an object in circular motion, which of the following is/are directed perpendicular to the plane of the circle? Angular Acceleration, Tengintial Velocity, Angular Velocity, Tangential Acceleration, or Angular Displacement? 2. You are on Earth. Assume that one month is about 30 days...

A wheel is rotating about an axis that is in the z-direction. The angular velocity w_z is -6.00 rad/s at t=0, increases linearly with time, and is +8.00 rad/s at t =7.00s. We have taken counterclockwise rotation to be positive. a.) Is the angular acceleration during this time interval...

A 300m tower is built on the equator. How much faster does a point at the top of the tower move than a point at the bottom? The Earth is 6400km thus c=2pi * 6400000m and c of the top of the tower is c= 2pi *6400300m Now what? Thanks. Stephen

How many revolutions does the object make during the first 4 s well the area under the graph of the angular velocity versus time graph is 60 but I do not know how that helps. Any help would be appreciated. Stephen

Hi there! I'm doing a particular question which is the angular velocity and I got stuck there halfway through. Homework Statement Find the angular velocity omega *see attachment Va = 1.4m/s to the left Homework Equations Vb/a = l * omegaAB Vb = Va + Vb/a The Attempt at a...

Homework Statement Consider an electric dipole located in a region with an electric field of magnitude \vec{E} pointing in the positive y direction. The positive and negative ends of the dipole have charges +q and -q, respectively, and the two charges are a distance D apart. The dipole has...

Homework Statement A cameraman standing at A is following the movement of a race car traveling at a speed of 30 m/s. Determine the angular rate (theta dot) at which the man must turn to keep the camera directed on the car at theta = 30 degrees...

Homework Statement so i need to find the angular velocity of a solid sphere rolling down an inclined plane. I know the mass, radius, and distance the sphere travels. Homework Equations The Attempt at a Solution I know how to get angular velocity, but i need the translational...

A uniform rod has length 87 m and mass 8 kg. A mass of 8 kg is attached at one end. The other end of the rod is pivoted about the horizontal axis. a) determine the torque immediately after the rod-plus-mass system is released from the horizontal position. b) After the rod-plus-mass system...

hi i am a beginner at physics. my teacher just gave me this problem for a make up work but he did not give me any equations on solving this problem due to some misunderstanding he got mad at me. so here i am stuck... please help! A discus thrower (arm length 1.2 m) starts from rest and...

[SOLVED] Angular Velocity 1. The angular acceleration is given \alpha=-2w^2 rad/s^2 where \omega is the angular velocity in rad/s. When \theta=30 deg the angular velocity is 10 rad/s. What is the angular velocity when \theta=60deg? [b]2. Used \alpha=d\varpi/d\theta * \varpi...

[SOLVED] Problem finding angular velocity... ! Homework Statement The 9.65 lb uniform disk is pin supported at its center and is acted upon by a constant force of P = 1.45 lb as shown. The system starts from rest. Radius of disk is .470 ft The force P is going straight down from the...

Homework Statement Imagine that you swing about your head a .250 kg ball attached to the end of a string. The ball moves at a constant speed in a horizontal circle with a radius of 1.50 m. If it takes 1.20 seconds for the ball the make one revolution, (a)what is the ball's tangential speed...

[SOLVED] Angular velocity - different ans by conserv E and momentum Homework Statement This is Advanced Physics by Adams and Allday, spread 3.31, question 3. A pirouetting skater halves his moment of inertia by pulling in his arms and legs closer to his axis of rotation. a) By what factor...

angular velocity?! Homework Statement Hello, I am a 1st yr biomechanics student and I am having a lot of problems figuring this stuff out and I have an exam coming up and I'm kinda panicing! lol! ok here is the exact problem: "A 60kg diver is positioned so that his radius of gyration is...

Homework Statement Two thin rectangular sheets (0.26 m 0.35 m) are identical. In the first sheet the axis of rotation lies along the 0.26 m side, and in the second it lies along the 0.35 m side. The same torque is applied to each sheet. The first sheet, starting from rest, reaches its final...

For the rotational motion, on my book, it says "Since w (angular velocity) is the same for all points of a rotating object, a (alpha) also will be the same for all points.w and a are properties of the rotating object as a whole." The thing that I don't get is that why velocity is the same at...

Homework Statement What are the units of angular velocity of precession? I've looked evrywhere and can't find out. Homework Equations The Attempt at a Solution In my answer to a question, by putting units into the equation i think I am getting units as rad^-1 s^-1 but not sure...

Both angular frequency in Simple Harmonic Motion and angular velocity in Rotational Motion are given the same symbol, "omega" (w). I was wondering if these two values are equivalent. For instance, if there was a cylinder attached to spring and rolling down a ramp, would the angular frequency of...

I am a little stuck with angular velocity and I do not know where to start on this one question. A bicycle wheel has a diameter 60 cm. Determine its angular velocity in radians per seconds, when the bicycle travels at 20km/h Could somebody please help as to where to start Very much...

1. How do various distances influence the angular velocity of earth? Tangential velocity? explain Homework Equations 3. For some reason, I tend to think that distance doesn't relate, but I do not know where to begin to explain. I also could not find the answer in my physics book.

James move sin a circular path (radius 15.0m) with a speed of 60 m/s. His angular acceleration in rpm is? DO you ahve to convert to rad/s then to rev/s then rev/m? Any help would be appreciated

Homework Statement Which one of the following statements is NOT true for a rotating CD undergoing angular acceleration? A) The angular speed is the same at any point on the disk B) The lnear speed is the same at any point on the disk C) The angular accerlation is perpendicular to the...

Can someone please explain the difference in Angular Velocity for a Horizontal and a Vertical circle? :confused:

SOLVED: Angular velocity of an electron 1. The Bohr model of the hydrogen atom pictures the electron as a tiny particle moving in a circular orbit about a stationary proton. In the n = 2 orbit the distance from the proton to the electron is 21.16*10^-11 m, and the linear speed of the electron...

Homework Statement The angular velocity of the spinning Earth is approximately... 0.26 rad/hr 6.28 rad/hr 0.13 rad/hr or none of the above I am new at this forum as of today! I hope that somebody could show me how I should even begin this! I have no idea! Homework Equations 1 rev/s=...