Saturday

April 19, 2014

April 19, 2014

Number of results: 52,335

**Math **

Jack decides to ride the ferris wheel. He board at 1m and is the last person on the ride. The diameter of the wheel is 16m and it takes 8sec for one complete revolution. Find the equation that represents Jack's height in relation to time. Then use the equation to detiremine ...
*Sunday, May 23, 2010 at 5:40pm by Sarah*

**Trigonometry**

My answer: Y= -82.5 cos (4pi/3)x+91.5 (Period: 1.5=2pi/b --> b= 4pi/3 ) The diameter of the wheel is 165 feet, it rotates at 1.5 revolutions per minute, and the bottom of the wheel is 9 feet above the ground. Find an equation that gives a passenger's height above the ground...
*Thursday, July 18, 2013 at 10:52pm by Anonymous*

**PHYSICS HELP**

A disk has a moment of inertia of 3.0x10^-4 and rotates with an angular speed of 3.5 rad/sec. WHat net torque must be applied to bring it to rest in 3.0s? can some one help me out with this im lost!!!
*Tuesday, November 13, 2007 at 11:18pm by PHYSICS HELP*

**Physics**

A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.20 104 rad/s to an angular speed of 3.14 104 rad/s. In the process, the bit turns through 1.92 104 rad. Assuming a constant angular acceleration, how long would it take the bit to reach its...
*Monday, October 22, 2012 at 1:34pm by Sam*

**Trigonometry**

The tires on a car have radius 14 inches. Find the angular speed of the car tire in revolutions per second when it is traveling 70 mph. Find the angular speed at 80 mph. The tires on a car are 15 inches. Find the linear speed of the car when the tires are rotating at 900 ...
*Saturday, January 21, 2012 at 3:03pm by Will*

**physics**

A 34.1 kg child rides a Ferris wheel whose diameter is 18.3 m. When the ride is turning at a constant rate, the child’s speed has a constant value of 4.23 m/s. Find the normal force the seat exerts on the child at: a) The top of the ride b) The bottom of the ride
*Monday, July 1, 2013 at 7:08pm by justin*

**physics**

a disc of radius 5.70 cm rotates about its axis and a point 1.90 cm from the center of the disc moves 34.5 cm in 12.2 s .calculate the angular velocity of the disc.
*Monday, March 18, 2013 at 12:37pm by fernando guzman*

**physics**

a disc of radius 5.70 cm rotates about its axis and a point 1.90 cm from the center of the disc moves 34.5 cm in 12.2 s .calculate the angular velocity of the disc.
*Monday, March 18, 2013 at 12:41pm by fernando guzman*

**physic**

The angular position of a point on the rim of a 45.8 cm rotating wheel is given by θ(t) = 3.6 t2 − 2.8 t +7.5, What is the instantaneous speed v of the point at time t = 6.5 s?
*Monday, September 20, 2010 at 9:42pm by annie*

**Physics HELP!**

A coin rests 18.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.420. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.650 rad/s2. (a) After 3.00 s, what is the ...
*Saturday, October 27, 2012 at 3:13pm by Anonymous*

**physics**

A wheel initially rotating at an angular speed of 1.2 rad/s turns through 34 revolutions during the time that it is subject to angular accelaration of .4 rad/s/s. How long did the accelaration last? So I used theta=Wot+.5at^2. converted rev to rad. and set it up like a ...
*Wednesday, November 18, 2009 at 10:09pm by Andy *

**PHYSICS!!!**

The flywheel of a steam engine runs with a constant angular velocity of 220 rev/min. When steam is shut off, the friction of the bearings and of the air stops the wheel in 2.7 h. (a) What is the constant angular acceleration, in revolutions per minute-squared, of the wheel ...
*Wednesday, March 5, 2008 at 8:05pm by greg*

**physics**

A soild wheel initially rotating at 50.0 rad/s comes to a uniform stop after 8.00 rotations. Calculate the tangential accleration at the rim. Given that the angular acceleration is -24.9 rad/s^2. I know its aT = r alpha but how do I get the radius?
*Saturday, November 8, 2008 at 7:27pm by Rod*

**physics**

Compute the linear momentum and angular momentum of a Frisbee of mass 0.175 kg if it has a linear speed of 1.65 m/s and an angular velocity of 61.5 rad/s. Treat the Frisbee as a uniform disk of radius 12.0 cm.
*Wednesday, March 14, 2012 at 1:09pm by John*

**Physics**

Compute the linear momentum and angular momentum of a Frisbee of mass 0.160 kg if it has a linear speed of 2.00 m/s and an angular velocity of 50.0 rad/s. Treat the Frisbee as a uniform disk of radius 15.0 cm.
*Sunday, April 8, 2012 at 9:28pm by Nem*

**Physics Classical Mechanics**

A gyroscope consists of a uniform disc of mass radius M= 2 kg and radius R= 0.2 m . The disc spins with an angular speed ω= 300 rad⋅s-1 as shown in the figure below. The gyroscope precesses, with its axle at an angle 30∘ below the horizontal (see figure). The ...
*Thursday, November 14, 2013 at 9:34am by Anonymous*

**Physics URGENT!!!**

A coin rests 18.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.420. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.650 rad/s2. (a) After 3.00 s, what is the ...
*Saturday, October 27, 2012 at 5:54pm by Anonymous*

**physics**

I already took this course. It is your turn to try the problems. When we see exactly what you are having trouble with perhaps we can help. Remember Torque = rate of change of angular momentum = I alpha omega = w = angular speed angular momentum = I w alpha = dw/dt = rate of ...
*Wednesday, January 5, 2011 at 9:35am by Damon*

**Physics**

You failed to mention moment of inertia. I recommend you reread that section, it is what imposes resistance to change of angular motion. Torque=momentinertia*alpha (alpha is angular acceleartion, in radians/sec^2) Torque*time=momentinertia*change angular velocity angular speed...
*Friday, July 30, 2010 at 3:36pm by bobpursley*

**Physics**

A person is riding on a Ferris wheel. When the wheel makes one complete turn, is the net work done by the gravitational force positive, negative, or zero? Justify your answer. What to you think? After one complete turn the elevation remains unchanged. Elevation determines ...
*Tuesday, March 20, 2007 at 5:30pm by Mary*

**Math**

James uses a measuring wheel to find the length of a cross-country race course he holds the handle and rolls the wheel along the course.The wheel has a radius of 1 foot and it turns 2,000 times from the beginning to the end of the race course, how long is the course?Explain ...
*Tuesday, March 12, 2013 at 11:16pm by Jaiden*

**phsyics**

A wheel has a radius of 6.6 m. How far (path length) does a point on the circumference travel if the wheel is rotated through an angle of 52.0°?
*Sunday, November 4, 2012 at 2:05pm by Anonymous*

**physics**

A wheel has a radius of 6.6 m. How far (path length) does a point on the circumference travel if the wheel is rotated through an angle of 52.0°?
*Sunday, November 4, 2012 at 6:51pm by Anonymous*

**trig**

if you are riding on a ferris wheel that is 60 ft tall and it takes you 5 minutes to make 1 revolution, what is your linear velocity?
*Friday, January 20, 2012 at 10:20am by Destiny*

**Physics- Elena please help!**

A coin rests 18.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.420. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.650 rad/s2. (a) After 3.00 s, what is the ...
*Monday, October 29, 2012 at 5:31pm by Anonymous*

**Physics- Elena please help!**

A coin rests 18.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.420. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.650 rad/s2. (a) After 3.00 s, what is the ...
*Monday, October 29, 2012 at 6:13pm by Stan*

**Physics**

TURNTABLE SOLUTIONS A gyroscope consists of a uniform disc of mass radius M= 1 kg and radius R= 0.3 m . The disc spins with an angular speed ω= 400 rad⋅s-1 as shown in the figure below. The gyroscope precesses, with its axle at an angle 30∘ below the ...
*Sunday, November 24, 2013 at 11:19am by Anon*

**Trig**

linear speed1= r1*angular speed linear speed2= r2*angular speed difference= (r1-r1)angular speed
*Wednesday, September 12, 2007 at 11:30am by bobpursley*

**Physics URGENT!!!**

A wheel has a radius of 3.5 m. How far (path length) does a point on the circumference travel if the wheel is rotated through an angle of 71.0°? B) A wheel has a radius of 3.5 m. How far (path length) does a point on the circumference travel if the wheel is rotated through an ...
*Friday, October 26, 2012 at 4:34pm by Anonymous*

**physics**

as i have known that centripetal force is directly proportional to the angular speed square. so, what is the relationship between angular speed and centripetal force ? when centripetal force increase, does angular speed increase too? i need more explanation.
*Monday, July 29, 2013 at 2:43pm by kate*

**math**

ANGULAR SPEED OF A RACE CAR. A race car is driven around a circular track at a constant speed of 180miles per hour. If the diameter of the track is 1/2mile, what is the angular speed of the car? Express your answer in revolutions per hour(which is equivalent to laps per hour) ...
*Wednesday, June 13, 2007 at 8:14pm by michelle*

**trig**

A Ferris wheel has a radius of 15 meters and takes 20 seconds to complete one full revolution. The seat you are riding in, takes 7 seconds to reach the top which is 35 meters above the ground. Write a sine or cosine equation for the height of your seat above the ground as a ...
*Monday, July 26, 2010 at 11:32pm by dave*

**AP Physics**

A merry-go-round rotates at the rate of.2rev/s with an 80kg man standing at a point 2m from the axis ofrotation. (A)What is the new angular speed when the man walksto a point 1m from the center? Assume that the merry-go-round is a solid 25kg cylinder of radius of 2m. B. ...
*Thursday, March 4, 2010 at 8:50pm by Justin *

**Physics**

Each tire on a car has a radius of 0.330 m and is rotating with an angular speed of 19.5 revolutions/s. Find the linear speed v of the car, assuming that the tires are not slipping against the ground.
*Monday, October 24, 2011 at 12:41am by Jasmin*

**physics! please help!! **

A particle rotates counterclockwise in a circle of radius 6.5 m with a constant angular speed of 7.4 rad/s. At t = 0, the particle has an x coordinate of 3.3 m and y > 0 . A) Determine the x coordinate of the particle at t = 0.716 s. Answer in units of m ( I know this ...
*Thursday, December 6, 2012 at 10:45pm by michelle*

**physics**

A centrifuge is a common laboratory instrument that separates components of differing densities in solution. This is accomplished by spinning a sample around in a circle with a large angular speed. Suppose that after a centrifuge in a medical laboratory is turned off, it ...
*Thursday, November 3, 2011 at 10:19pm by marie*

**Physics**

A student sits on a rotating stool holding two 3.4-kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is 3.0 kg · m2 and is ...
*Tuesday, November 27, 2012 at 10:59pm by Jessica*

**physics**

A particle rotates counterclockwise in a circle of radius 6.5 m with a constant angular speed of 7.4 rad/s. At t = 0, the particle has an x coordinate of 3.3 m and y > 0 . A) Determine the x coordinate of the particle at t = 0.716 s. Answer in units of m ( I know this ...
*Thursday, December 6, 2012 at 9:05pm by michelle*

**math**

the constant angular acceleration of pulley is 4rad/s2, angular speed 3 rad/s, determine the radius of pulley if the total acceleration of a print on the rim of the pulley is 3.5m/s2
*Tuesday, July 31, 2012 at 12:35am by ajay*

**math **

A pulley with a radius of 8 inches rotates three times every five seconds. Find the angular velocity of the pulley in radians/sec (round to the nearest hundredth). Find the linear velocity to the nearst ft/hr.
*Monday, August 13, 2012 at 8:32pm by Anonymous*

**Physics**

tangential speed= radius* angular velocity at time of breaking.
*Tuesday, April 20, 2010 at 1:07am by bobpursley*

**physics**

Tangential velocity=radius of circle -:- angular speed=4-:-2=2m/s
*Tuesday, October 18, 2011 at 12:15am by Abby*

**physics**

A wheel has a radius of 4.56 m. How far (path length) does a point on the circumference travel if the wheel is rotated through an angle of 26.2°?
*Thursday, March 8, 2012 at 2:00pm by Jackie *

**physics**

A wheel has a radius of 6.6 m. How far (path length) does a point on the circumference travel if the wheel is rotated through an angle of 52.0 rad?
*Sunday, November 4, 2012 at 2:21pm by Anonymous*

**physics (clear answer)**

Multiple-Concept Example 10 provides one model for solving this type of problem. Two wheels have the same mass and radius of 5.0 kg and 0.47 m, respectively. One has (a) the shape of a hoop and the other (b) the shape of a solid disk. The wheels start from rest and have a ...
*Thursday, April 3, 2014 at 6:34pm by jason*

**Physics**

A popular carnival ride consists of a large, round room that rotates fast enough that any person standing against the wall will be stuck there, even as the floor is dropped away from their feet. The coefficient of static friction between the person and the wall is μs , ...
*Thursday, July 26, 2012 at 12:00pm by Zac*

**Math**

Paul's car can have wheel's ranging from 18-24 inches radius. He has the option of getting a wheel with the diameter of 2 and half feet, 3 and half feet, or 4 and half feet. What size wheel should he purchase? Explain?
*Monday, April 9, 2012 at 8:43pm by Ronasia Mcbride*

**PHYSICS**

A space station shaped like a giant wheel has a radius 105 m and a moment of inertia of 5.09 108 kg · m2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1g. When 100 people move to the center of the station ...
*Wednesday, October 31, 2012 at 3:37pm by PLEASE HELP*

**Physics **

A space station shaped like a giant wheel has a radius 105 m and a moment of inertia of 5.09 108 kg · m2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1g. When 100 people move to the center of the station ...
*Thursday, November 1, 2012 at 1:30pm by Ashley*

**Physics please help!!**

A 60cm diameter bike wheel starts at rest and develops an angular speed of 12.0 rad/s in 10 seconds. What linear distance does the bike travel?
*Tuesday, February 22, 2011 at 10:17pm by Megan*

**SCIENCE,PHYSICS**

A thin ring with resistance R=10 Ω and self inductance L=0.2 H rotates with constant angular speed ω=100 rad/s in an external uniform magnetic field perpendicular to the rotation axis. As a result, the magnetic flux created by the external field varies with time as...
*Thursday, July 18, 2013 at 10:26am by kk*

**physics**

how many revolutions per minute would a 15 m ferris wheel need to make for passengers to feel weightless at the top?
*Sunday, January 2, 2011 at 11:41pm by elle*

**Pre Algebra**

Thanks PsyDAG. This was the very first ferris Wheel so that's why it was so big and held a lot of people. I wasn't given any other information.
*Tuesday, May 15, 2012 at 2:33pm by Ann*

**physics**

linear acceleration=1.71/min^2, I certainly would change that to rad/sec^2 , time radius tangential acceleration=angularacceleration*radius. Since angular acceleration is constant, it does not matter what angular velocity is.
*Monday, September 27, 2010 at 7:26pm by bobpursley*

**College Physics**

Some bacteria are propelled by motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.1x10-8m, and a tangential speed at the rim of 2.0x10-5 m/s. (a) What is the angular speed (the magnitude of the angular ...
*Monday, March 5, 2012 at 6:55pm by Angela*

**physics**

A 57.0 kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 23.0 m. (a) What is the centripetal acceleration of the child? (b) What force (magnitude and direction) does the seat exert on the child at the lowest point of the ride? (c...
*Sunday, June 19, 2011 at 9:31pm by Sarah*

**Physics**

How does torque equal to <frictional force times radius [of solid cylinder]>? " A potter's wheel, a thick stone disk of radius 0.50 m and mass 100 kg, is freely rotating at 50 rev/min. The potter can stop the wheel in 6.0 s by pressing a wet rag against the rim and ...
*Wednesday, October 30, 2013 at 11:36pm by Ánfer*

**Intro to physics**

A space station shaped like a giant wheel has a radius 105 m and a moment of inertia of 5.09 108 kg · m2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1g. When 100 people move to the center of the station ...
*Wednesday, October 31, 2012 at 12:10pm by Sam*

**Physics**

A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration of 0.180 rad/s2. After making 2874 revolutions, its angular speed is 139 rad/s. A. What is the initial angular ...
*Friday, March 30, 2012 at 5:11pm by Natasha*

**physics**

A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.170 rad/s2. After making 2870 revolutions, its angular speed is 131 rad/s. (a) What is the initial angular ...
*Tuesday, July 16, 2013 at 2:08pm by kyle*

**physics**

The rectangular coils in a 331 turn generator are 14 cm by 17 cm. What is the maximum emf produced by this generator when it rotates with an angular speed of 525 rpm in a magnetic field of 0.95 T?
*Thursday, February 27, 2014 at 5:17pm by rosita*

**Physics**

angular speed= 2PI/day convert that to radians/sec Then tangentialspeed= above ang;ular speed times radius for any other latitude, multipy all that by cosine Latitude
*Friday, March 30, 2012 at 6:07pm by bobpursley*

**Physics**

1.(a)When a record player is stopped, the turnabble initially rotating at 33.3rpm,slows down and stops 60s.Calculate the angular acceleration of the turnable.(b)a grinding wheel when turned on,accelerates with an agnular acceleration of 50rad/s^2 . How much time is required to...
*Tuesday, November 14, 2006 at 5:45am by miss sixty*

**physics**

Because angular momentum is conserved, I*w = (Moment of intertia)*(angular speed) remains constant Therefore 1.72*(15 rad/s)= 0.061*(final angular speed) Final angular speed = 15*1.72/0.061 = 423 rad/s Kinetic energy = (1/2)*I*w^2 increases by the same (w2/w1) factor, sinc I*w...
*Saturday, February 11, 2012 at 10:19am by drwls*

**Physics**

The Spinning Figure Skater. The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis through its center . When his hands and arms are brought in and wrapped around his body to execute the spin, the hands and...
*Tuesday, March 27, 2007 at 3:36pm by Karla*

**U. Phys**

What is the angular momentum of a 3.7kg uniform cylindrical grinding wheel of radius 25cm when rotating at 1500rpm? How much torque(in magnitude) is required to stop it in 5.0s? Could you explain this in detail, I don't really understand torque and momentum well.
*Monday, November 2, 2009 at 10:43am by Taylor*

**Physics**

In a playground, there is a small merry-go-round of radius 1.20 m and mass 190 kg. Its radius of gyration (see Problem 85 of Chapter 10) is 91.0 cm. A child of mass 44.0 kg runs at a speed of 4.50 m/s along a path that is tangent to the rim of the initially stationary merry-go...
*Monday, October 26, 2009 at 10:46pm by Ray*

**Physics - Rotational Mechanics**

The combination of an applied force and a constant frictional force produces a constant total torque of 35.8 Nm on a wheel rotating about a fixed axis. The applied force acts for 5.95 s. During this time the angular speed of the wheel increases from 0 to 9.9 rad/s. The applied...
*Sunday, March 4, 2007 at 11:09pm by John*

**physics**

A bicycle is moving at 8.3 m/s. What is the angular speed of its tires if their radius is 42 cm?
*Monday, October 22, 2007 at 12:30pm by steph*

**Physics**

How do I find tangential speed with just radius, time and angular acceleration?
*Monday, January 3, 2011 at 8:26am by MT*

**Physics**

The sun is not involved in this problem, only the earth. The earth does not rotate around the sun. Rotate means to spin around once on its own axis. The earth revolves around the sun in a year, but rotates around its own axis every ~24 hours. 1) They give you the radius, and ...
*Sunday, May 3, 2009 at 6:14pm by RickP*

**AP Physics**

A uniform spherical shell of mass M and radius R rotates about a vertical axiss on frictionless bearings. A massless cord passes around the equator of the shell, over a pulley of rotational inertia I and radius r, and is attached to a small object mass m. There's not friction ...
*Sunday, January 27, 2008 at 5:18pm by Kristen*

**AP physics**

A uniform spherical shell of mass M and radius R rotates about a vertical axiss on frictionless bearings. A massless cord passes around the equator of the shell, over a pulley of rotational inertia I and radius r, and is attached to a small object mass m. There's not friction ...
*Sunday, January 27, 2008 at 6:05pm by Kristen*

**Trigonometry**

A race car is driven around a circular track at a constant speed of 180mph. If the diameter is 1/2 mile, what is the angular speed of the car? Express your answer in revolutions per hour. The formula for angular speed is w=theta (in radians)/time
*Monday, April 12, 2010 at 3:01pm by Anonymous*

**Trigonometry**

A race car is driven around a circular track at a constant speed of 180mph. If the diameter is 1/2 mile, what is the angular speed of the car? Express your answer in revolutions per hour. The formula for angular speed is w=theta (in radians)/time
*Monday, April 12, 2010 at 4:50pm by Anonymous*

**Physics**

The spinning wheel has angular momentum, lined up with its axis of spin. If you try to turn that axis, that requires torque, because you are changing the angular momentum vector. (the direction, not the magnitude). However the frame (gimbals) allow the vehicle to rotate around...
*Friday, January 27, 2012 at 6:46pm by Damon*

**Physics**

A student on a piano stool rotates freely with an angular speed of 2.85rev/s . The student holds a 1.10kg mass in each outstretched arm, 0.789m from the axis of rotation. The combined moment of inertia of the student and the stool, ignoring the two masses, is 5.23kg⋅m2...
*Thursday, November 7, 2013 at 6:40pm by Patricia*

**physics**

Find the scale reading for a 70 {\rm kg} person at the bottom of the Ferris wheel, assuming a constant rotation rate.
*Saturday, October 9, 2010 at 11:46am by Anonymous*

**Pre Calculus **

If you are riding on a Ferris wheel that is 60 feet tall and it takes 5 minutes to make a one revolution, what is your linear velocity?
*Monday, April 22, 2013 at 8:52pm by Deontre*

**INTRO TO PHYSICS**

Each of the following objects has a radius of 0.174 m and a mass of 2.16 kg, and each rotates about an axis through its center (as in the table below) with an angular speed of 37.3 rad/s. Find the magnitude of the angular momentum of each object. >Hoop of thin cylindrical ...
*Wednesday, October 31, 2012 at 12:09pm by Sandy*

**Physics**

In a playground, there is a small merry-go-round of radius 1.20 m and mass 190 kg. Its radius of gyration (see Problem 85 of Chapter 10) is 91.0 cm. A child of mass 44.0 kg runs at a speed of 4.50 m/s along a path that is tangent to the rim of the initially stationary merry-go...
*Monday, October 26, 2009 at 11:18pm by Ray*

**phyics**

The steering wheel of a car has a radius of 0.19 m, and the steering wheel of a truck has a radius of 0.26 m. The same force is applied in the same direction to each steering wheel. What is the ratio of the torque produced by this force in the truck to the torque produced in ...
*Friday, November 1, 2013 at 1:12pm by bobby*

**physics**

A wheel, starting from rest, has a constant angular acceleration of 1.8 rad/s^2. In a 3.1-s interval, it turns through an angle of 142 rad. How long has the wheel been in motion at the start of this 3.1-s interval?
*Wednesday, April 2, 2014 at 5:39pm by Tsion*

**physics**

a tire 0.500 m in radius rotates at a constant rate of 200 rev/min.find the speed and accelation of a small stone lodge in the thread(on its outer edge).
*Saturday, September 15, 2012 at 8:35am by cabarles*

**physics**

Find the moment of Inertial for a cylinder of rad, and mass given. Torque=I*angluaracceleration and of course torque is force*radius. b) angular displacement=1/2 angularacc*tim^2 and of course, line pulled in is equal to angular displacement*radius
*Thursday, October 23, 2008 at 1:55am by bobpursley*

**physics**

A train is rounding a circular curve whose radius is 1.87E+2 m. At one instant, the train has an angular acceleration of 1.51E-3 rad/s2 and an angular speed of 0.0470 rad/s. Find the magnitude of the total acceleration (centripetal plus tangential) of the train.
*Friday, March 16, 2012 at 10:30pm by Katie*

**phys**

A disk rolls down a slope. It rotational axis is its center of mass. It is rotation at a constant angular speed making 34.0 full revolutions in a time interval of 3.30 s. 1)What is the rotational inertia of the disk if its mass is 11.7 kg, and its radius is 49.6 cm? A=1.44kmg^...
*Monday, December 7, 2009 at 12:38pm by ami*

**physics**

A wheel, starting from rest, has a constant angular acceleration of 1.3 rad/s2. In a 2.5-s interval, it turns through an angle of 98 rad. How long has the wheel been in motion at the start of this 2.5-s interval?
*Monday, March 17, 2008 at 3:14pm by shelby*

**Physics**

Here's the question again that I am trying to get help with because I can't figure it out and I got one answer, but I really couldn't understand it. Help please! A ferris wheel makes one rotation in 15 minutes. Find your car's location and the angle of rotation after: 3 mins...
*Wednesday, May 16, 2012 at 8:16pm by Ann*

**Physics**

The wheel radius makes no difference. They want an ANGULAR acceleration (or, in this case, deceleration) rate. So, convert 1800 rpm to radians/s (which you surely know how to do) and divide the result by 11.0 seconds. You should strictly put a minus sign in front of the number...
*Thursday, April 12, 2012 at 4:53pm by drwls*

**Math**

You are standing on the equator of the earth (radius 3960 miles). What is your linear and angular speed?
*Tuesday, November 24, 2009 at 3:38am by Anonymous*

**science **

A solid sphere of radius r is gently placed on rough horizontal ground with an initial angular speed and no linear velocity if the coefficient of friction is find the time when the slipping stops in addition state the linear velocity and angular velocity at the end of slipping
*Friday, May 3, 2013 at 12:14pm by Prashant Sartale*

**Physics**

A bicycle wheel of radius 0.30 m is spinning at a rate of 60 revolutions per minute. What is the centripetal acceleration of a point that is 0.11 m from the outer edge of the wheel?
*Sunday, February 17, 2013 at 8:43pm by Erin *

**Trig**

A 7.25 inch circular saw blade rotates at 5200 revolutions per minute. a) Find the angular speed of the saw blade in radians per minute. b) Find the linear speed in feet per minute of one of the 24 cutting teeth as they contact the wood being cut.
*Sunday, April 1, 2012 at 6:20pm by Emily*

**Physics**

An athlete swings a 3.46 kg ball horizontally on the end of a rope. The ball moves in a circle of radius 0.55 m at an angular speed of 0.35 rev/s. What is the tangential speed of the ball?
*Tuesday, February 7, 2012 at 12:29pm by Holly *

**ap physics**

You measure the radius of a wheel to be 4.16 cm. If you multiply by 2 to get the diameter, should you write the result as 8 cm or as 8.32 cm? Justify your answer.
*Sunday, September 19, 2010 at 2:33pm by carlos*

**Physics**

A children merry go round in the consist of 300 kg solid horizontal disk of radius 8.5 m. It rotates at a speed of .25 revolution per second while a person of mass 150 km takes a ride at the edge of the disk. How fast will the disk be rotating if the person walks 4m along the ...
*Saturday, December 14, 2013 at 11:16pm by Tsunayoshi*

**Physics 111-1**

A wheel, starting from rest, has a constant angular acceleration of 1.8 rad/s2. In a 3.7-s interval, it turns through an angle of 52 rad. How long has the wheel been in motion at the start of this 3.7-s interval?
*Sunday, November 18, 2012 at 10:33pm by Paula*

**physics**

How many revolutions per minute would a 15 -diameter Ferris wheel need to make for the passengers to feel "weightless" at the topmost point?
*Wednesday, March 6, 2013 at 8:44am by Anonymous*

**Physics***

A student sits on a rotating stool holding two 3.2-kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is 3.0 kg · m2 and is ...
*Thursday, October 20, 2011 at 12:40pm by Allie*

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