Angular speed Definition and 267 Threads

An electric fan is running on HIGH. After fan has been running of 13.2 minutes, the LOW button is pushed. The fan slows down to 98 rad/sec in 1.83 seconds. The blades of the fan have a radius of 0.62 meters and their deceleration rate is 42.3 rad/sec2. What was the initial angular speed of...

On a frictionless table, a glob of clay of mass 0.740 kg strikes a bar of mass 1.740 kg perpendicularly at a point 0.140 m from the center of the bar and sticks to it. If the bar is 0.660 m long and the clay is moving at 9.600 m/s before the impact, what is the final speed of the center of mass...

The coil of a generator has a radius of 0.14 m. When this coil is unwound, the wire from which it is made has a length of 5.7 m. The magnetic field of the generator is 0.20 T, and the coil rotates at an angular speed of 25 rad/s. What is the peak emf of this generator? Please help me get...

I'm kinda having trouble figuring out this problem...i already know that i have to use conservation of angular momentum Iiwi=Ifwf but I'm having trouble calculating the key part, the second moment of inertia. I'm pretty sure that im' supposed to be using this form of the calculation of inertia...

I'm kinda having trouble figuring out this problem... i was thinking of doing a system of equations to relate the present angular and new angular speed but that didn't really get me anywhere because i wasn't really including all the variables in the problem... that and i couldn't simplify it...

Two skaters, each of mass 85 kg, approach each other along parallel paths separated by 3.5 m. They have equal and opposite velocities of 1.6 m/s. The first skater carries one end of a long pole with negligible mass, and the second skater grabs the other end of it as she passes. Assume...

A proposed space station includes living quarters in a circular ring 50.3 m in diameter. At what angular speed should the ring rotate so the occupants feel 0.411 g where g is the gravitational acceleration on the surface of the Earth?

A high-speed sander has a disk 4.00 cm in radius that rotates about its axis at a constant rate of 1100 revolutions per minute. Determine the angular speed of the disk in radians per second. I get angular displacement / Time = 360rad/.0545454s 180=pi*rad <= need help figuring out radians...

A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Each time the pulsar makes one revolution, the rotating beam sweeps across the earth, and the Earth receives a pulse of radio waves. For one particular pulsar, the time between two...

The ROTOR is an amusement park ride where people stand against the inside of a cylinder. Once the cylinder is spinning fast enough, the floor drops out. If the coefficient of friction is 0.42 and the cylinder has a radius of 2.5m, what is the minimum angular speed of the cylinder so that the...

velocity = 0.5 m/s radius = 1 m \omega = \frac{v}{r} \omega = \frac{0.5 m/s}{1 m} the meters cancel and I'm left with \omega = 0.5 s But \omega is supposed to be expressed in radians/s How do I get those output units with the given input units?

angular speed question! please help right away! a pencil, 15.7 cm long, is released from a vertical position with the eraser end resting on a table. The eraser does not slip. Treat the pencil like a uniform rod. what is the angular speed of the pencil just before it hits the table? i know...

:cry: Why can't I get this obviously KE is conserved so I use I(initial) x Angular speed(initial)=I(final) x Angular speed(final) A uniform rod of mass 3.05×10-2kg and length 0.440m rotates in a horizontal plane about a fixed axis through its center and perpendicular to the rod. Two small...

I have a book that gives a formulae Angular Speed as same as the Angular Velocity...is that true? From what i understand, speed is a scalar quantity...so it only have the magnitude value while velocity is a vector quantity which also shows the direction. Also, will the average angular...

I really need help !- angular speed and speed at equilibrium position Problem 1. A 5.00-kg block free to move on a horizontal, frictionless surface is attached to one end of a light horizontal spring. The other end of the spring is held fixed. The spring is compressed 0.100m from equilibrium...

A solid ball of mass 1.30 kg and diameter 19.0 cm is rotating about its diameter at 65.0 rev/min. What is its kinetic energy? Also, if an additional 2.60 J of energy are supplied to the rotational energy, what is the new angular speed of the ball?

I have a couple problems that I have started but don't quite know where to go with them. If someone could respond ASAP it would be greatly appreciated as one of them will probably appear on a test tomorrow :) Thanks! 1) A potters wheel (a thick stone disk with a radius of .500 m and a mass...