Friday

April 18, 2014

April 18, 2014

Number of results: 52,335

**Physics**

A rotating wheel requires 9.00 s to rotate 29.0 revolutions. Its angular velocity at the end of the 9.00 s interval is 98.0 rad/s. What is the constant angular acceleration of the wheel in radians/second squared? (Do not assume that the wheel starts at rest.)
*Thursday, November 4, 2010 at 8:21pm by Annie*

**physics**

A star the size of the sun has a mass 8 times as great. It rotates on its axis once every 12 days. It then collapses into a neutron star of radius 10km, losing three quarters of its mass in the process. How long does it take to rotate once after collapse? (it's spere though ...
*Friday, November 30, 2012 at 12:53pm by ashley*

**Physics **

A cyclist starts from rest and pedals such that the wheels of his bike have a constant angular acceleration. After 20.0 s, the wheels have made 219 rev. What is the angular acceleration of the wheels? What is the angular velocity of the wheels after 20.0 s? If the radius of ...
*Wednesday, April 2, 2014 at 1:35pm by Ted*

**Trigonometric Functions! (Ferris Wheel)**

well, since sin(x) has a max at x=90, and a min at x=270, that phase shift makes sense. You will have something along the lines of sin(x+270) The radius of the wheel is 9, and the whole wheel is lifted 2m, so we have 9sin(x+270)+11 see, at x=0, y=9(-1)+11 = 2 at x=90, y=9(0)+...
*Tuesday, May 21, 2013 at 4:08pm by Steve*

**Physics**

At t = 0, a wheel rotating about a fixed axis at a constant angular deceleration of 0.37 rad/s2 has an angular velocity of 0.5 rad/s and an angular position of 8.5 rad. What is the angular position of the wheel after 2 s? Answer in units of rad
*Tuesday, March 5, 2013 at 8:22pm by dallas*

**physics**

THE wheel is not spinning, so the point on the top of the wheel is moving at the same speed as the wagon, and angular velocity of course is zero. This is an odd question.
*Tuesday, January 20, 2009 at 9:50pm by bobpursley*

**Physics**

A wheel has its speed increased from 120 to 240 rev/min in 20 sec. a.) What is the angular acceleration? b.) How many revolutions of the wheel are required?
*Monday, January 31, 2011 at 1:22am by Art*

**Physics**

A wheel has its speed increased from 120 to 240 rev/min in 20 sec. a.) What is the angular acceleration? b.) How many revolutions of the wheel are required?
*Monday, January 31, 2011 at 1:22am by Art*

**Trig **

As you ride a ferris wheel, your distance from the ground varies sinusoidally with time. When the last passenger boards the ferris wheel and the ride starts moving, let your position be modeled by the diagram provided. Let t be the number of seconds that have elapsed since ...
*Thursday, March 22, 2012 at 12:43pm by TRig*

**Physics**

a bicycle turned upside down whiles owner repairs a flat tire. A friend spins the other wheel, of radius R, and observed that drops of water fly off tangentially. She measures the height reached by drops vertically. A drop that breaks loose from the tire on one turn rises a ...
*Tuesday, October 19, 2010 at 4:10am by Anonymous*

**Physics problems**

Hi, everyone who is going to read this, thank you for trying to help me, this really means a lot to me, you are saving my behind! Ok, so here it goes: I was wondering if this information is correct; please tell me if it is not A Ferris wheel is a vertical wheel...it undergoes ...
*Sunday, October 28, 2007 at 7:32pm by Serena*

**Physics**

A Ferris Wheel with a radius of 15 meter makes one complete rotation every 10 seconds.
*Sunday, March 4, 2012 at 4:33pm by Mina*

**physics help**

An automobile tire has a radius of 0.280 m, and its center moves forward with a linear speed of v = 18.0 m/s. (a) Determine the angular speed of the wheel. (Assume that there is no slipping of the surfaces in contact during the rolling motion.) rad/s (b) Relative to the axle, ...
*Saturday, November 27, 2010 at 2:15pm by john*

**physics**

A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is rotating at 7.8 rad/s; 60 radians later, its angular speed is 19 rad/s. Calculate (a) the angular acceleration (rad/s2), (b) the time required to ...
*Wednesday, November 13, 2013 at 4:37pm by kristy*

**physics**

A machine part rotates at an angular speed of 0.38 rad/s; its speed is then increased to 3.46 rad/s using an angular acceleration of 0.61 rad/s2. Find the angle through which the part ro- tates before reaching this final speed. Answer in units of rad
*Friday, October 21, 2011 at 7:48pm by phys101*

**Physics**

A person on a rotating stool with arms stretched out rotates at an angular speed of 5.00 rad/s. On bringing in his arms, the angular speed increases to 7.50 rad/s. By what factor does the moment of inertia change?
*Monday, November 4, 2013 at 1:38pm by Mikhail*

**physics**

A toy train track is mounted on a large wheel that is free to turn with negligible friction about a vertical axis (see the figure). A toy train of mass m = 2.5 kg is placed on the track and, with the system initially at rest, the electrical power is turned on. The train ...
*Monday, November 9, 2009 at 11:35pm by Emily*

**Math**

The rim of the London Eye (a 135m diameter ferris wheel) moves 26 cm/sec, slow enough for passengers to safely get on the wheel from the platform (2 meters above ground level) without stopping the wheel at the bottom of its rotation. What's the height at the bottom of the ...
*Monday, December 10, 2012 at 4:53pm by anna*

**Angular acceleration**

Appreciate if someone can advise on how to calculate the following: A hoist lifts a 3.5kg load from rest, and has a final velocity of 2 m/s after 4 seconds. The motor can develop a torque of 4 Nm. Determine: i) The linear acceleration of the mass. ii) The angular acceleration ...
*Saturday, March 24, 2007 at 7:46am by BIGEYE*

**trig**

Given the radius of a wheel is 12inches and the angular speed is measured to be 3pie/4 radiant per second, find the linear speed of the piece of gum stuck to the where. Give both an exact answer. And a decimal answer rounded to 4 decimal places.
*Saturday, September 17, 2011 at 10:45pm by ALISON*

**physics 2...help please**

A wheel on a game show is given an initial angular speed of 1.33 rad/s. It comes to rest after rotating through 3/4 of a turn. (a) Find the average torque exerted on the wheel given that it is a disk of radius 0.76 m and mass 6.4 kg. ? N·m sorry, I'm having converting issues...
*Wednesday, October 22, 2008 at 1:03am by kelsey*

**physics**

A car weighing 1.07 x 10^4 N is at rest on a 32.5° incline. Each wheel bears an equal part of the car's weight. Thus the axles apply a vertical downward force of 2.68 x 10^3 N to the center of each wheel. (a) Find the frictional force exerted by the road on each wheel (b) Find...
*Tuesday, April 27, 2010 at 4:13pm by Michael*

**Physics**

A Ferris wheel has a radius of 14 m. What period of rotation would give the occupants a feeling of "weightlessness" at the top? __s
*Sunday, March 4, 2012 at 8:57am by Sam*

**physics**

A skater rotates 760 degrees clockwise, stops, and rotates counterclockwise for 340 degrees. What is her angular distance? Angular displacement?
*Monday, February 25, 2013 at 10:00pm by Mark*

**Physics **

A skater rotates 880 degrees clockwise, stops, and rotates counterclockwise for 340 degrees. What is her angular distance? Angular displacement?
*Tuesday, August 6, 2013 at 11:07pm by Kc*

**Physics**

A device consists of eight balls each of mass 0.4 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 ...
*Sunday, April 14, 2013 at 4:01pm by Emily*

**Physics**

A Ferris Wheel, 24.0 m in diameter, rotates once every 12.5s. What is the fractional change in a person's apparent weight: a) at the top, and b) at the bottom? I need to know if I'm doing this right. Here's my work: Equation Used: Net Force = [(4(pi)^2)(R)(M)] / [T^2] M=mass T...
*Thursday, January 20, 2011 at 12:20am by Ricky*

**Maths**

Bill and Steve decide to spend the afternoon at an amusement park enjoying their favorite activities, the water slide and the gigantic Ferris wheels. Their tickets are stamped each time they slide or ride. At the end of the afternoon they have the following tickets: (Bill's ...
*Monday, March 25, 2013 at 10:51pm by Jeconiah*

**calculus**

2. A spin balancer rotates the wheel of the car at 480 revolutions per min. if the diameter of the wheel is 26 in what road speed is being tested in the miles per hour? Round to the nearest tenth
*Monday, April 30, 2012 at 7:34pm by Nolan *

**Maths**

I have a trig question regarding a ferris wheel, radius 35m, axles 37m, clockwise direction, rotates twice every 10 mins. I have calculated the following function: h = -35cos(2pi*X/5)+37 I have calculated at what height I would be after 3 minutes by substituting X=3 in the ...
*Tuesday, October 13, 2009 at 8:02am by Melody*

**physics**

A conveyer belt is driven by a large (diameter = 1.0 m) wheel. The wheel starts from rest and has an angular acceleration of 0.35 rad/s 2. (a) Through what angle does the wheel turn in 18 s? (b) What is the wheel's angular velocity at that time...
*Wednesday, January 12, 2011 at 9:20pm by teal*

**Physics **

A point on the rim of a 0.75 m diameter grinding wheel changes speed at a constant rate from 15 m/s to 21 m/s in 6.2 s. What is the average angular acceleration of the wheel in rad/s^2?
*Thursday, February 24, 2011 at 6:30pm by Britney *

**College Physics**

A wheel of radius 0.398 m is mounted on a frictionless horizontal axis. The rotational inertia of the wheel about the axis is 0.0576 kg·m2. A massless cord wrapped around the wheel is attached to a 0.790 kg block that slides on a horizontal frictionless surface. If a ...
*Friday, July 6, 2012 at 10:29pm by Stephanie*

**Physics**

A wheel is rolling ithout slipping at 487 meters per second to the right on a level surface. the diameter of the wheel is 100 centimeters. What is the angular speed of the wheel in revolutions per minute? Please walk me through your steps, don't just suggest a formula. Thank ...
*Monday, June 11, 2012 at 2:50pm by Jen*

**Physics Really Need Help Please**

At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 25.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns through an angle of 440 rad as it coasts to a stop at constant angular ...
*Friday, November 7, 2008 at 9:34pm by Samantha*

**physics**

ssm A string trimmer is a tool for cutting grass and weeds; it utilizes a length of nylon "string" that rotates about an axis perpendicular to one end of the string. The string rotates at an angular speed of 56 rev/s, and its tip has a tangential speed of 60 m/s. What is the ...
*Wednesday, November 3, 2010 at 10:16pm by Anonymous*

**Physics 121**

A bicycle wheel has a radius R = 32 cm and a mass M = 1:80 kg which you may assume to be concentrated on the outside radius. Assume that you apply a force F to a sprocket so that the wheel has an angular acceleration ® = 4:50 rad/s2. A resistive force f = 131 N is applied to ...
*Saturday, March 27, 2010 at 6:55pm by claudia*

**Physics 1 (Calc Based)**

At t = 0, a wheel rotating about a fixed axis at a constant angular acceleration of –0.40 rad/s^2 has an angular velocity of 1.5 rad/s and an angular position of 2.3 rad. What is the angular position of the wheel at t = 2.0 s? Ans: Theta final=4.5 rad How do you solve step by ...
*Wednesday, March 31, 2010 at 12:59pm by Jared*

**physics**

The flywheel of an engine has a moment of inertia of 24 kg*m^2. a) if the radius of the wheel is 0.6m, what force is required to accelerate the wheel from rest to an angular velocity of 300 rpm in 6 seconds? b) how many turns does it make during this time?
*Wednesday, December 12, 2012 at 11:57pm by Natasha*

**physics**

The flywheel of an engine has a moment of inertia of 24 kg*m^2. a) if the radius of the wheel is 0.6m, what force is required to accelerate the wheel from rest to an angular velocity of 300 rpm in 6 seconds? b) how many turns does it make during this time?
*Wednesday, December 12, 2012 at 11:57pm by Natasha*

**Dynamics**

A flywheel has an angular speed of 1200 rev/min when its motor is turned off. The wheel attains constant decelerations of 1.5 rad/s2 due to friction in its bearing. Determine the time required for the wheel to come to rest and the number of revolutions the wheel makes before ...
*Monday, July 30, 2012 at 1:55pm by Rajan*

**Dynamics**

a flywheel has an angular speed of 1200rev/min when its motor is turned off.the wheel attains constant decelerations of 1.5rad/s2 due to friction in its bearing.determine the time required for the wheel to come to rest and the numer of revolutions the wheel makes before it ...
*Wednesday, August 1, 2012 at 3:34am by sanjeev kumar*

**physics**

A record player is spinning at 32 rpm when the motor is switched off. After 6.8 seconds the angular speed has decreased to 20 rpm. Calculate the frictional torque if the record player can be treated as a solid wheel of mass 2.4 kg and radius 15 cm. A) 476.47059 Nm B) 0.00499 ...
*Sunday, November 28, 2010 at 8:57pm by emily *

**physics**

questions( there are 3 so I will # 1-3) info: A 18.9 kg object is attached to a cord that is wrapped around a wheel of radius 10.7 cm. The acceleration of the object down the frictionless incline is measured to be .9 m/s2. Assume the axle of the wheel to be frictionless. The ...
*Monday, March 24, 2008 at 4:18pm by Ty*

**physics**

a wheel of radius R rotates making f revolutions per second. the quantity f is know as the frecuency of the motion. show tha 1/f is the time to complete one revolution, called the period T of the motion. show that the centripetal acceleration of a point at the rim of the wheel...
*Monday, November 8, 2010 at 10:25pm by katy*

**physics**

Each of the following objects has a radius of 0.180 m and a mass of 2.65 kg, and each rotates about an axis through its center (as in the table below) with an angular speed of 41.4 rad/s. Find the magnitude of the angular momentum of each object. a) a hoop ___ kg m/s b) a ...
*Saturday, December 15, 2012 at 11:56pm by anonymous*

**physics**

Each of the following objects has a radius of 0.180 m and a mass of 2.65 kg, and each rotates about an axis through its center (as in the table below) with an angular speed of 41.4 rad/s. Find the magnitude of the angular momentum of each object. a) a hoop ___ kg m/s b) a ...
*Saturday, December 15, 2012 at 11:58pm by anonymous*

**Physics**

Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 6.00 s, it rotates 28.0 rad. During that time, what are the magnitudes of (a) the angular acceleration and (b) the average angular velocity? (c) What is the instantaneous angular ...
*Friday, November 25, 2011 at 12:20pm by S.Jacob*

**Physics**

A student on a piano stool rotates freely with an angular speed of 2.95 rad/s . The student holds a 1.35 kg mass in each outstretched arm, 0.739 m from the axis of rotation. The combined moment of inertia of the student and the stool, ignoring the two masses, is 5.13 kg m^2, a...
*Friday, March 18, 2011 at 5:13pm by marie*

**math**

The Earth rotates once every 24 hours. What is the angular speed of a point on the Earth's surface in rad/min. Give your answer to five decimal places. Use 3.14 for pi. (example units: m/s, mi/h)
*Saturday, May 19, 2012 at 8:40pm by Jill*

**Physics!**

I know I have to find angular speed in order to find the radius of orbit. With the radius of orbit and velocity I can find centripetal acceleration. I then apply Newton's 2nd Law to solve for the mass. I am stuck on finding angular speed...
*Friday, June 3, 2011 at 1:31pm by Allison*

**physics**

Starting from rest at t = 0 s, a wheel undergoes a constant angular acceleration. When t = 1.6 s, the angular velocity of the wheel is 5.5 rad/s. The acceleration continues until t = 17 s, when the acceleration abruptly changes to 0 rad/s2. Through what angle does the wheel ...
*Monday, March 5, 2012 at 2:06pm by Katie*

**physics**

Starting from rest at t = 0 s, a wheel undergoes a constant angular acceleration. When t = 1.6 s, the angular velocity of the wheel is 5.5 rad/s. The acceleration continues until t = 17 s, when the acceleration abruptly changes to 0 rad/s2. Through what angle does the wheel ...
*Sunday, March 11, 2012 at 8:23pm by Katie*

**Pre-Cal **

A Ferris wheel is 50 meters in diameter and boarded from a platform that is 5 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes one full revolution every 9 minutes. You make two complete revolutions on...
*Friday, February 14, 2014 at 1:12pm by Alanas*

**physics**

A 4.50-kg wheel that is 34.5 cm in diameter rotates through an angle of 13.8 rad as it slows down uniformly from 22.0 rad/s to 13.5 rad/s. What is the magnitude of the angular acceleration of the wheel? A) 0.616 rad/s 2 B) 22.5 rad/s 2 C) 5.45 rad/s 2 D) 10.9 rad/s 2 E) 111 ...
*Thursday, June 28, 2012 at 9:51pm by help me!!!*

**Dynamics**

A pelton wheel attains its operating speed of 800 rev/min% determine constant angular acceleration of pelton wheel
*Monday, July 30, 2012 at 10:17pm by benny*

**Physics - still confused -Please help**

The velocity of pulling in the line is is V = w * R , which means Linear speed = (Angular speed)*(Radius) = 2.1m/9.7s = 0.2165 m/s Angular speed = 0.2165/0.3 = 0.7216 rad/s
*Saturday, February 25, 2012 at 10:36am by drwls*

**Physics**

Our sun rotates in a circular orbit about the center of the Milky Way galaxy. The radius of the orbit is 2.2 1020 m, and the angular speed of the sun is 1.2 10-15 rad/s. (a) What is the tangential speed of the sun? m/s (b) How long (in years) does it take for the sun to make ...
*Thursday, March 6, 2008 at 3:09pm by John*

**math**

a car's wheel turns at 200 rpm. the radius of each wheel is 1.3 ft. to the nearest radian per minute, what is the angular velocity of a point: on the tire thread? on the hubcap .4ft from the center? right at the center?
*Monday, March 26, 2012 at 1:25pm by michaela c*

**Physics**

A flywheel of a radius .5 m starts from rest and under goes a uniform angular acceleration of 3 rad/sec2 for a period of 5 seconds. Find the angular velocity of the flywheel at the end of this time? Find the angular displacement (in radians) that the wheel turns through during...
*Wednesday, May 9, 2012 at 1:19am by Mary*

**Physics/Calculus**

At a county fair, a boy and two friends bring their teddy bears on the giant Ferris wheel. The wheel has a diameter of 14.8 m, the bottom of the wheel is 1.8 m above the ground and its rim is moving at a speed of 1.0 m/s. The boys are seated in positions 45° from each other. ...
*Thursday, October 14, 2010 at 8:16pm by Donny*

**Trigonometry**

A car with wheel of radius 14 inches is moving in a speed of 55 mph.Find the angular speed of the wheel in radian per sec. your car is moving at 55 mph, which is 55*5280*12 inches/3600 seconds or 968 inches/second. each rotation of the wheel covers 2*14*pi inches. so the ...
*Tuesday, July 3, 2007 at 8:08am by James*

**Physics**

A wheel with rotational inertia I is mounted on a fixed, fricitonless axle. The angular speed w of the wheel is inccreased from zero to w_f in a time interval T. 1: What is the average net torque on the wheel during the time interval, T? a) w_f/T b)w_f/T^2 c) Iw_f^2/T d)Iw_f/T...
*Sunday, March 25, 2007 at 4:49pm by Tammy*

**physics**

A person is riding a bicycle, the wheels of a bicycle have an angular velocity of +20.5 rad/s. Then, the brakes are applied. In coming to rest, each wheel makes an angular displacement of +12.0 revolutions. (a) How much time does it take for the bike to come to rest? (b) What ...
*Wednesday, November 10, 2010 at 8:14pm by sean*

**physics**

A person is riding a bicycle, the wheels of a bicycle have an angular velocity of +24.0 rad/s. Then, the brakes are applied. In coming to rest, each wheel makes an angular displacement of +16.0 revolutions. (a) How much time does it take for the bike to come to rest? s (b) ...
*Thursday, November 17, 2011 at 8:53pm by Taylor*

**physics**

A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is rotating at 7 rev/s. 55 revolutions later, its angular speed is 21 rev/s. (a) Calculate the angular acceleration. (b) Calculate the time required to ...
*Sunday, March 11, 2007 at 10:46pm by winterWX*

**Pre Calculus 12**

Modelling with sine/cosine A Ferris wheel has a diameter of 30m. The bottom of the wheel is 1.5m off the ground it takes 3.5min to make one complete revolution. a person gets on ferris wheel at its lowest point at time = 0. write an equation that represents persons height ...
*Wednesday, January 23, 2013 at 10:53pm by Shreya*

**physics**

a car has wheel of 30cm radius. it starts from rest and accelerates uniformly to a speed of 15 m/s in a time of 8s. find the angular acceleration of its wheels and the number of rotations one makes in this time.
*Thursday, August 8, 2013 at 10:21pm by Anonymous*

**physics**

I need help with solving these word problems. Marion rides her racing bicycle @ speed of 8 m/s. Bicycle wheels have a radius of 34 cm. What is the angular speed of wheels? How many times does each wheel go around during a 10-min race? A car tire has radius of 33cm. Tire turns ...
*Monday, December 1, 2008 at 8:21pm by physics*

**Physics**

I need help with solving these word problems. Marion rides her racing bicycle @ speed of 8 m/s. Bicycle wheels have a radius of 34 cm. What is the angular speed of wheels? How many times does each wheel go around during a 10-min race? A car tire has radius of 33cm. Tire turns...
*Monday, December 1, 2008 at 8:59pm by physics*

**math**

The radius of each wheel of a car is 16 inches. At how many revolutions per minute should a spin balancer be set to balance the tires at a speed of 90 miles per hour? What is the setting for a wheel of radius 14 inches?
*Tuesday, March 30, 2010 at 8:31pm by Alex*

**physics**

Search: A person is riding a bicycle, the wheels of a bicycle have an angular velocity of +18.0 rad/s. Then, the brakes are applied. In coming to rest, each wheel makes an angular displacement of +11.0 revolutions. How much time does it take for the bike to come to rest? What ...
*Friday, February 25, 2011 at 2:16am by Taylor*

**differential calculus**

a ferris wheel 15m in diameter makes 1 revolution every 2 minutes. If the center of the wheel is 9m above the ground, how fast is the passenger in the wheel moving vertically when he is 12.5m above the ground?
*Monday, August 8, 2011 at 9:55pm by Adler*

**Physics**

A 0.25 mass is located on the outer edge of a wheel of radius 0.75 m that is turning at a rate of 2 revs/s. Determine the following: 1) The period of the mass 2) The angular speed of the mass in rad/s c) The tangential speed of the mass d) The centripetal acceleration of the ...
*Sunday, December 13, 2009 at 7:11pm by Monika*

**Maths**

if there is a cylindrical ride (radius r) and when it rotates the person feels pinned tot he wall and then the floor drops away. how would i start to find the equation of the angular speed needed to keep the person against the wall????
*Saturday, October 22, 2011 at 5:33am by Sarah*

**Precalculus**

A wheel rolling at a constant speed has a radius of 15 inches and takes 30 seconds to roll 100 feet along the ground. What is its angular velocity? Use 3.14 for pie, and solve to two decimal places.
*Wednesday, February 22, 2012 at 5:12pm by Liz*

**physics**

3- An electric motor can accelerate a Ferris wheel of moment of inertia (I =20 000 kg.m2) from rest to (10.0 rev/min) in (12.0 s). When the motor is turned off, friction causes the wheel to slow down from (10.0 to 8.00 rev/min) in (10.0 s). Determine (a) the torque generated ...
*Saturday, March 16, 2013 at 1:47pm by a*

**Physics**

A boy sits on a ferris wheel. how much work is done on him by gravitional forces when the wheel makes one complete turn? Explain.
*Sunday, November 14, 2010 at 7:24pm by Anonymous*

**MathMate - look at this**

ok, arclength of course! For some reason I had the wheel rotating and was looking for the up-down motion similar to a ferris-wheel. thanks.
*Monday, December 13, 2010 at 11:19pm by Reiny*

**physics help!!**

a wheel of radius R rotates making f revolutions per second. the quantity f is know as the frecuency of the motion. show tha 1/f is the time to complete one revolution, called the period T of the motion. show that the centripetal acceleration of a point at the rim of the wheel...
*Monday, November 8, 2010 at 10:32pm by katy*

**Physic**

A CD rotates from rest up to an angular speed of 32.40 radians per second in a time of 0.861 seconds. Determine the angle (in degrees) through which the disc turns while coming up to speed assuming that the tangential acceleration is uniform. I hve tried omega = change in ...
*Sunday, November 4, 2012 at 1:24pm by Janki Patel*

**physics**

Consider an old-fashion bicycle with a small wheel of radius 0.15 m and a large wheel of radius 0.8 m. Suppose the rider starts at rest, accelerates with a constant acceleration for 2 minutes to a velocity of magnitude 12 m/s. He maintains this velocity for 14 mintues and ...
*Wednesday, November 14, 2012 at 11:39pm by Captain Jack*

**Physics**

A hemispherical bowl of radius R is rotated about its axis of symmetry which is kept vertical. A small block is kept in the bowl at a position where the radius makes an angle Θ with the vertical. The block rotates with the bowl without any slipping. The friction ...
*Monday, January 2, 2012 at 12:49am by Kewal*

**Physics**

A 70.50 kg man rides a Ferris wheel with a radius of 10.3 m at a velocity of 5.00 m/s. What is the centripetal force that she experiences expressed with the correct number of significant figures?
*Sunday, January 8, 2012 at 1:38am by Pat*

**physics**

A rotating wheel requires 5.00 s to rotate 30.0 revolutions. Its angular velocity at the end of the 5.00 s interval is 100.0 rad/s. What is the constant angular acceleration of the wheel?
*Sunday, July 6, 2008 at 9:45am by Elisa*

**physics**

An automobile wheel with a 9.00-cm radius and the radius to the rim is 7cm, as shown below, rotates at 2.50 rad/s. How fast does a point 6.50 cm from the center travel? 1 cm/s
*Friday, November 26, 2010 at 1:52pm by javane*

**physics**

If the CD rotates clockwise (let's take clockwise rotation as positive) at 500 (revolutions per minute) while the last song is playing, and then spins down to zero angular speed in 2.60 with constant angular acceleration, what is , the angular acceleration of the CD, as it ...
*Wednesday, October 24, 2012 at 9:39pm by Anonymous*

**Physics Angular Momentum**

Initial angular momentum of bullet around axis of wheel = I w = m r^2 w = m r v = .00483 * .148 * 330 = .2359 Final angular momentum of bullet around axis of wheel = .00483 * .148 * 201 = .1437 change in angular momentum of bullet = .2359 - .1437 = .0922 that is the angular ...
*Monday, July 11, 2011 at 6:46pm by Damon*

**Physics**

An automobile tire has a radius of 0.380 m, and its center moves forward with a linear speed of v = 19.0 m/s. (a) Determine the angular speed of the wheel. (Assume that there is no slipping of the surfaces in contact during the rolling motion.) rad/s (b) Relative to the axle, ...
*Thursday, April 3, 2008 at 5:40pm by La' TGasha*

**Math**

In one revolution a wheel moves forward a distance equal to its circumference. This is because the wheel Always in contact with the floor. 1)A trundle wheel clicks everytime. What is the radius of the wheel
*Saturday, October 5, 2013 at 6:51pm by Bob*

**physics**

The drive propeller of a ship starts from rest and accelerates at 3.00 10-3 rad/s2 for 2.05 103 s. For the next 1.75 103 s the propeller rotates at a constant angular speed. Then it decelerates at 2.30 10-3 rad/s2 until it slows (without reversing direction) to an angular ...
*Thursday, November 10, 2011 at 2:22am by Marco*

**physics**

The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.5 m. The magnetic field of the generator is 0.10 T, and the coil rotates at an angular speed of 25 rad/s. What is the peak emf of this generator?
*Friday, February 15, 2008 at 10:24pm by rick*

**Physic Angular momentum and torque**

What is the angular momentum of a 1.0kg uniform cylindrical grinding wheel of radius 19cm when rotating at 1700rpm ?How much torque is required to stop it in 4.6s ?
*Saturday, March 29, 2014 at 11:19am by David*

**Physics**

A person is riding a bicycle, the wheels of a bicycle have an angular velocity of +18.5 rad/s. Then, the brakes are applied. In coming to rest, each wheel makes an angular displacement of +14.5 revolutions. (a) How much time does it take for the bike to come to rest? 1 s (b) ...
*Tuesday, February 22, 2011 at 11:01pm by Lauren*

**Physics**

A 22.8 kg turntable with a radius of 47 cm is covered with a uniform layer of dry ice that has a mass of 4.08 kg. The angular speed of the turntable and dry ice is initially 0.52 rad/s, but it increases as the dry ice evaporates. What is the angular speed of the turntable once...
*Monday, April 14, 2008 at 6:00pm by Christina*

**Trig**

angular speed is frequency * 2pi = 8pi rad/min linear speed = angular speed * radius = 8pi * 25 = 200pi ft/min
*Sunday, April 1, 2012 at 6:19pm by Steve*

**Physics Classical Mechanics**

A metal meter stick made of steel rotates about its midpoint. The angular speed is slowly increased. At what value of the angular speed will the stick break apart at the center? Give your answer in rad/s. Hint: find a relationshop between the maximum angular frequency and the ...
*Wednesday, November 27, 2013 at 3:37pm by Anonymous*

**Physics**

The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.8 m. The magnetic field of the generator is 0.21 T, and the coil rotates at an angular speed of 26 rad/s. What is the peak emf of this generator? Answer ...
*Sunday, March 17, 2013 at 1:30am by Ashley*

**Physics**

The coil of a generator has a radius of 0.12 m. When this coil is unwound, the wire from which it is made has a length of 5.8 m. The magnetic field of the generator is 0.21 T, and the coil rotates at an angular speed of 26 rad/s. What is the peak emf of this generator? Answer ...
*Sunday, March 17, 2013 at 1:32am by Ashley*

**Physics - Angular Momentum**

Water drives a waterwheel (or turbine) of radius 3.5 m. The water enters at a speed v_1 = 7.5 m/s and exits from the waterwheel at a speed v_2 = 4.0 m/s. a) If 84 kg of water passes through per second, what is the net torque? b) If the water causes the waterwheel to make one ...
*Friday, April 18, 2008 at 4:49am by Nik*

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