Friday

April 29, 2016
Number of results: 37,292

**physics**

The Earth has a radius of about 6.38 ´ 103 kilometers at the equator and rotates 360° every 24 hours. The angular displacement of a person standing at the equator for 8.0 hours is:
*April 7, 2013 by carmen*

**physics**

A student sits on a freely rotating stool holding two weights, each of which has a mass of 3.00 kg. When his arms are extended horizontally, the weights are 1.00 m from the axis of rotation and he rotates with an angular speed of 0.750 rad/s. The moment of inertia of the ...
*December 5, 2006 by nicole*

**pre cal**

if a 22 inch tire rotates 40 times per 2 minutes, determine the linear and angular speed of the tire.
*February 6, 2011 by karina*

**pre cal**

If an 22-inch tire rotates 40 times per 2 minute, determine th elinear and angular speed of the tire.
*February 8, 2011 by karina*

**physics**

A space station, in the form of a wheel 110 m in diameter, rotates to provide an "artificial gravity" of 3.00 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of rotation of the wheel (in revolutions per minute) that will produce this effect. ...
*July 10, 2010 by laura*

**Algebra II**

suppose you are biking down a hill at 24 mi/h. What is the angular speed, in radians per second, of your 27-inich-diameter bicycle wheel?
*April 25, 2010 by Alex*

**physics**

a wheel turning with angular speed of 30 rps is brought to rest with constant acceleration. It turns 60 revolutions before it stops.
*April 28, 2011 by sarah*

**math (trig.)**

A ferris wheel is 35 meters in diameter and boarded at ground level. The wheel makes one full rotation every 8 minutes, and at time (t=0) you are at the 3 o'clock position and descending. Let f(t) denote your height (in meters) above ground at t minutes. Find a formula for f(t).
*January 28, 2013 by fawn*

**physics**

The figure shows a bicycle wheel resting against a small step whose height is h = 0.110 m. The weight and radius of the wheel are W = 26.0 N and r = 0.370 m. A horizontal force is applied to the axle of the wheel. As the magnitude of increases, there comes a time when the ...
*March 26, 2011 by Alicia*

**physics**

The figure shows a bicycle wheel resting against a small step whose height is h = 0.120 m. The weight and radius of the wheel are W = 20.0 N and r = 0.340 m. A horizontal force is applied to the axle of the wheel. As the magnitude of increases, there comes a time when the ...
*October 22, 2014 by ram*

**physics**

If the rotational speed of each wheel is 9 revolution per second, what are the tangential speeds of a point on the rim of each wheel? Note: Wheels spin independently with equal rotation speeds -Diameter of Wheel A: 24 -Diameter of Wheel B: 12
*March 2, 2011 by kelly*

**physics**

If the rotational speed of each wheel is 9 revolution per second, what are the tangential speeds of a point on the rim of each wheel? Note: Wheels spin independently with equal rotation speeds -Diameter of Wheel A: 24 -Diameter of Wheel B: 12
*March 3, 2011 by kelly*

**physics**

Two gears A and B are in contact. The radius of gear A is twice that of gear B. (a) when A’s angular velocity 6.00 Hz counter clockwise, what is B’s angular velocity? (b) If A’s radius to the tip of the teeth is 10.0 cm what is the linear speed of a point on the tip of a gear ...
*October 3, 2011 by John*

**phys**

A disk with a rotational inertia of 2.0 kg.m^2 and a radius of 0.40 m rotates on a frictionless fixed axis perpendicular to the disk faces and through its center. A force of 5.0 N is applied tangentially to the rim. The angular acceleration of the disk is:
*May 1, 2014 by jay*

**physics**

A disk with a rotational inertia of 1.4 kg×m2 and a radius of 0.8 m rotates on a frictionless fixed axis perpendicular to the disk faces and through its center. A force of 5.2 N is applied tangentially to the rim. The angular acceleration of the disk is:
*December 31, 2015 by Ahmad*

**Physics help!**

Suppose a revolving door at the bamk is spinning around once every 5 seconds. As you walk through, you push on the door for 2 seconds, which increases the rotational speed so that it rotates once a second. What was the rotational acceleration due to your push?
*December 13, 2012 by Anonymous*

**physics**

Two objects of equal mass are on a turning wheel. Mass 1 is located at the rim of the wheel while mass 2 is located halfway between the rim and the axis of rotation. The wheel is rotating with a non-zero angular acceleration. For each of the following statements select the ...
*March 20, 2012 by Miriam*

**Physics**

Two objects of equal mass are on a turning wheel. Mass 1 is located at the rim of the wheel while mass 2 is located halfway between the rim and the axis of rotation. The wheel is rotating with a non-zero angular acceleration. For each of the following statements select the ...
*March 21, 2012 by Miriam*

**Physics**

planet orbits a star once every 2.84 10^7 s in a nearly circular orbit of radius 1.42 10^11 m. (a) With respect to the star, determine the angular speed of the planet. (b) With respect to the star, determine the tangential speed of the planet. (c) With respect to the star, ...
*November 16, 2011 by Kelsey*

**Physics(Please help)**

A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.44 x 104 rad/s to an angular speed of 5.05 x 104 rad/s. In the process, the bit turns through 1.77 x 104 rad. Assuming a constant angular acceleration, how long would it take the bit to ...
*June 7, 2012 by Hannah*

**Physics PLEASE HELP!**

Suppose a revolving door at the bamk is spinning around once every 5 seconds. As you walk through, you push on the door for 2 seconds, which increases the rotational speed so that it rotates once a second. What was the rotational acceleration due to your push?
*December 13, 2012 by Anonymous*

**PHYSICS PLEASEEEE HELP ME**

Suppose a revolving door at the bank is spinning around once every 5 seconds. As you walk through, you push on the door for 2 seconds, which increases that rotational speed so that it rotates once a second. What was the Rotational acceleration due to your push?
*December 17, 2012 by Anonymous*

**Physics**

On an open-reel tape deck, the tape is being pulled past the playback head at a constant linear speed of 0.372 m/s. (a) If the radius of the film taken up so far (as shown in the upper part of the drawing) is 0.0576 m, find the angular speed of the take-up reel. ____ rad/s (b...
*October 25, 2010 by Jordan*

**physics**

a 60kg man is on a steadily rotating Ferris wheel. the man is standing on a bathroom scale and the scale reads 45kg at the top of the wheel. take g=10m/s^2 (a) what does the scale read when the man is at the bottom of the wheel? (b)what does the scale read when the man is ...
*October 12, 2010 by mani*

**physic**

A student on a piano stool rotates freely with an angular speed of 3.07 rev/s. The student holds a 1.38 kg mass in each outstretched arm, 0.759 m from the axis of rotation. The combined moment of inertia of the student and the stool, ignoring the two masses, is 4.72 kg·m2, a ...
*March 25, 2010 by Mary*

**Physics**

A student on a piano stool rotates freely with an angular speed of 3.07 rev/s. The student holds a 1.38 kg mass in each outstretched arm, 0.759 m from the axis of rotation. The combined moment of inertia of the student and the stool, ignoring the two masses, is 4.72 kg·m2, a ...
*March 22, 2016 by Mackenzie*

**Astronomy**

Black holes can be completely described by which three parameters? -angular momentum, spin, and electric charge -angular momentum, density, and radius -mass, angular momentum, and electric charge -mass, angular momentum, and radius
*March 16, 2013 by qwerty*

**Mechanics _ physics**

A wheel rotating with an angular velocity of 16rad/sec is slowed to an angular velocity of 4rad/sec by an angular acceleration of 2rad/sec^2.find a. The angle turned in the process of slowing down b. The time required
*February 14, 2013 by Precious*

**Physics**

A wheel of radius R starts from rest and accelerates with a constant angular acceleration alpha about a fixed axis. At what time t, will the centripetal and tangential accelerations of a point on the rim have the same magnitude?
*October 23, 2011 by Jc*

**earth-physics**

The Earth has an angular speed of 7.272 10-5 rad/s in its rotation. Find the new angular speed if an asteroid (m = 1.07 1022 kg) hits the Earth while traveling at a speed of 1.30 103 m/s (assume the asteroid is a point mass compared to the radius of the Earth) in each of the ...
*February 26, 2012 by huiol*

**Precalculus**

5. A water wheel has a radius of 60 feet, and the center is 14 feet above the water level. The water wheel makes a complete rotation every 45 minutes. A specific cup starts at the top of the wheel. Write a sine equation to model the above water wheel.
*January 11, 2013 by Valerie*

**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 ...
*October 31, 2012 by Sandy*

**please check**

If a wheel turns with a costant rotational speed then: each point on its rim moves with constant roational velocity, each point on its rim moves with constant translational acceleration, the wheel turns with constant translation acceleration, the wheel turns through equal ...
*December 9, 2006 by susane*

**Trigonometry**

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 at any time t during the ride. Assume the passenger starts the ride at the...
*July 18, 2013 by Anonymous*

**physics**

A ball of mass m is rotated at constant speed v in a vertical circle of radius r as shown below. Find the tension in the cord when the ball is at position A and position B. (Position a is in top of the wheel, position B is on the bottom of the wheel, 180 degrees apart.)
*November 25, 2011 by pakilina*

**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 ...
*November 18, 2009 by Andy *

**physics**

A car tire rotates with an average angular speed of 29rad/s. In what time interval will the tire rotate 3.5 times? Answer in units of sec.
*May 3, 2011 by fg*

**Math- Trig please help!**

A tire with a diameter of 100 cm rotates 20 times in 3 seconds. a) determine the angular velocity b) how far the tire has travelled? c) what is the speed in km/h?
*November 29, 2011 by linda*

**physics help please!!!**

What is the angular momentum of a 2.5 kg uniform cylindrical grinding wheel of radius 19 cm when rotating at 1200 rpm? And how much torque is required to stop it in 5.7 s? Need help with step-by-step explanation.
*March 25, 2010 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!!!
*November 13, 2007 by PHYSICS HELP*

**Trig**

mercury rotates around the sun in approx. 89 earth days (or 7,689,600 s. use a calculator to approximate its angular speed. choices: 4.09x10^-7 0.035 0.071 8.17x10^-7
*October 21, 2015 by Bill*

**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 ...
*March 5, 2008 by greg*

**Calculus**

A line rotates in a horizontal plane according to the equation Y = 2t^3- 6t, where Y is the angular position of the rotating line, in radians, and t is the time, in seconds. Determine the angular acceleration when t = 2 sec.
*August 22, 2015 by Linda*

**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...
*October 26, 2009 by Ray*

**Physics-Change in Angular Momentum**

What is the change in angular momentum of a planet with radius R if an asteroid mass m and speed v hits the equator at an angle from the west, 40 degrees from the radial direction?
*May 12, 2013 by Anthony*

**math **

a ferris wheel with a diameter of 76m. about how far would you travel in 8 turns ?
*August 10, 2011 by christina*

**Physics**

A platform rotates at an angular speed of 2.2 rad/s. A block rests on the platform a distance of 0.3m from the axis. Static friction coeffient= 0.5. Without any external torque acting on the system, the block is moved towards the axis. Ignore the moment of interia of the ...
*April 28, 2010 by Rita*

**Math**

2. A propeller on a gas turbine rotates 64° every 2.70 minutes. What is the angular velocity in rev/s? What is the linear speed of a point at the tip of the blade if the diameter of the blade is 5.37 ft?
*January 21, 2013 by Prince*

**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?
*February 27, 2014 by rosita*

**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...
*October 26, 2009 by Ray*

**Physics**

A block is on the end of a massless cable that is tied to a frictionless wheel (uniform disk) as shown in the figure at right. The wheel has a radius of 0.4 m. The system is initially at rest. If the block moves downward, with a constant acceleration, a distance of 2 m in 3 s...
*November 17, 2015 by Jack*

**physics**

Two objects of equal mass are on a turning wheel. Mass 1 is located at the rim of the wheel while mass 2 is located halfway between the rim and the axis of rotation. The wheel is rotating with a non-zero angular acceleration. For each of the following statements select the ...
*September 22, 2013 by Sue*

**physics**

Consider a hoola-hoop of radius R and it is spinning about its symmetry axis at a constant angular velocity. Now, I double its mass and halve its angular velocity. What is the new angular momentum in terms of the initial angular momentum?
*October 29, 2010 by Emily*

**PHYSICS ---HELP!**

Consider a hoola-hoop of radius R and it is spinning about its symmetry axis at a constant angular velocity. Now, I double its mass and halve its angular velocity. What is the new angular momentum in terms of the initial angular momentum?
*November 1, 2010 by lacey*

**physics help**

An electric circular saw is designed to reach its final angular speed, starting from rest, in 1.16 s. Its average angular acceleration is 375 rad/s2. Obtain its final angular speed.
*November 19, 2010 by harry*

**Physics**

Another Question---- A ball of clay of mass m travels with a velocity v in a path tangent to a disk of radius R and mass M. The clay collides with the disk tangentially to its outer rim (a totally inelastic collision) and the clay and disk begin to spin about the axis. a.) ...
*August 3, 2007 by bobby*

**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?
*November 8, 2008 by Rod*

**Physics 141**

A bicycle wheel resting against a small step whose height is h = 0.125 m. The weight and radius of the wheel are W = 23.1 N and r = 0.330 m, respectively. A horizontal force vector F is applied to the axle of the wheel. As the magnitude of vector F increases, there comes a ...
*April 5, 2014 by dakota22*

**Math**

Math - Zo, Wednesday, April 22, 2015 at 8:44pm A wheel has s radius of 9 inches. If the wheel is rolled on a flat surface, how many revolutions will it take for the wheel to travel 90 ~ pie inches
*April 22, 2015 by Zo*

**physics**

Calculate the speed at the edge of a disc of radius 4 cm that rotates at the rate of 8 rev/s. Answer in units of m/s.
*March 4, 2011 by Anonymous*

**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. ...
*March 4, 2010 by Justin *

**PHYSCIS FO SHIZZLE**

Hello, I was wondering how to explain the potential energy in a Ferris wheel, and if there were any reputable (aka not something such as Wikipedia, etc) that had an explanation for this? The only thing I have gathered is that mgh=Eg and that Eg is the energy stored in the ...
*November 2, 2007 by Physics_For_Life_Fo_Shizzle*

**Phisics (Urgent)!!!!!!!!!!!!!!!!!!!!!!**

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= 300 rad⋅s-1 as shown in the figure below. The gyroscope precesses, with its axle at an angle 30∘ below the horizontal. The gyroscope is ...
*November 20, 2013 by Anonimus*

**PHYSICS**

What power (in horsepower) is developed by a grinding machine whose wheel has a radius of 8.10 in and runs at 2.50 rev/s, when the tool to be sharpened is held against the wheel with a force of 43.0 lb? The coefficient of friction between the tool and the wheel is 0.340 . Help...
*April 6, 2015 by Beckles*

**Physics**

A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.20x10^4 rad/s to an angular speed of 3.14x10^4 rad/s. In the process, the bit turns through 1.92x10^4 rad. Assuming a constant angular acceleration, how long would it take the bit to reach ...
*October 23, 2012 by Sam*

**Physics**

A centrifuge takes 100 s to spin up from rest to its final angular speed with constant angular acceleration. If a point located 8.00 cm from the axis of rotation of the centrifuge moves with a speed of 150 m/s when the centrifuge is at full speed, how many revolutions does the...
*June 24, 2012 by Bloom*

**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?
*January 20, 2012 by Destiny*

**Trig. application**

Dave is going for a ride on his unicycle. The radius of the wheel is 25.5cm. When he gets on, the valve of the wheel is at its maximum height. He pedals along a path at a speed of 30km/h. At what height will the valve be located after he has cycled for 4 minutes? How do I find...
*April 28, 2012 by Anonymous*

**PHYSICS (HELP)**

A gyroscope consists of a uniform disc of mass radius M= 1 kg and radius R= 0.1 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 ...
*November 14, 2013 by Anonymous*

**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...
*March 27, 2007 by Karla*

**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 ...
*October 31, 2012 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 ...
*November 1, 2012 by Ashley*

**Physics questions**

Hello, I was wondering how to explain the potential energy in a Ferris wheel, and if there were any reputable (aka not something such as Wikipedia, etc) that had an explanation for this? The only thing I have gathered is that mgh=Eg and that Eg is the energy stored in the ...
*November 2, 2007 by Dr. Cameron*

**science**

A wheel with a radius of 20 cm is attached to an axle with a radius of 1cm. An effort force of 100 N on the wheel counters a resistance force of what on the axle?
*February 17, 2012 by Micheal*

**Physics**

A wheel with a radius of 20 cm is attached to an axle with a radius of 1cm. An effort force of 100 N on the wheel counters a resistance force of what on the axle?
*February 17, 2012 by Micheal*

**Physics**

A woman with a mass of 50kg is standing on the rim of a large disk that is rotating at an angular velocity of .50 rev/s about an axis through its center. The disk has a mass of 110kg and a radius of 4.0m. Calculate the magnitude of the total angular momentum of the woman-plus-...
*March 27, 2007 by Karla*

**Physics (Angular Momentum)**

A solid ball of radius 10cm and mas 8kg rolls in the y direction with a speed of 10 m/s At the instant that it is 3m from the origin along the x axis, what is the angular momentum (mag + direction) about its center of mass?
*July 13, 2012 by Jennifer*

**physics**

a ring rotates ar 30rad/s and has a radius of 3m and a mass 0f 100kg. If a disk(mass=40kg and with a radius of 4m) is dropped on the ring so the centers are aligned, what will be the resulting rotational speed of the ring-disc combination?
*June 29, 2010 by jason*

**physics**

A bike of wheel radius. 40 cm at its highest speed its meter show 300RPM.then evalute the speed of the bike on this reading
*May 17, 2014 by Rajesh*

**physics**

As the earth rotates through one revolution, a person standing on the equator traces out a circular path whose radius is equal to the radius of the earth (6.38 106 m). What is the average speed of this person in meters per second?
*August 19, 2009 by Anonymous*

**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 ...
*March 5, 2008 by greg*

**physics**

Calculate the speed at the edge of a disc of radius 8.5 cm that rotates at the rate of 4 rev/s. Answer should be in units of m/s Thanks
*January 20, 2009 by Bob*

**Physics 141**

The drawing shows a bicycle wheel resting against a small step whose height is h = 0.125 m. The weight and radius of the wheel are W = 23.1 N and r = 0.330 m, respectively. A horizontal force vector F is applied to the axle of the wheel. As the magnitude of vector F increases...
*April 3, 2014 by dakota22*

**Physics 141**

The drawing shows a bicycle wheel resting against a small step whose height is h = 0.125 m. The weight and radius of the wheel are W = 23.1 N and r = 0.330 m, respectively. A horizontal force vector F is applied to the axle of the wheel. As the magnitude of vector F increases...
*April 5, 2014 by dakota22*

**trigonometry**

Two pulleys have radii 20cm and 6cm,respectively. The smaller pulley rotates 15 times in 12 seconds. Find the angular speed of each pulley in rad/sec
*July 26, 2014 by helpme*

**Pre Calculus**

The diameter of a ferris wheel is 250 feet and θ is the central angle formed as Dave travels around the wheel. Dave starts his ride at Point 0, makes 4 complete revolutions and stops at Point 1, 45 degrees from Point 0. If his ride takes 5 minutes, how fast was he going ...
*March 7, 2011 by Roberta*

**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 ...
*April 3, 2014 by jason*

**physics**

an object of mass m moves with a uniform speed v round a circular path of radius r.if its angular speed is g the magnitude of the centripetal force acting on it is?
*September 12, 2014 by Josephine *

**electrical**

At t = 0 a grinding wheel has an angular velocity of 24.0 rad/s. It has a constant angular acceleration of 3.0 rad/s2 until a circuit breaker trips at t = 2.00 s. From then on it turns through 42 rad as it coasts to a stop at constant angular acceleration
*October 12, 2014 by bobo*

**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 ...
*October 31, 2012 by Sam*

**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 ...
*October 30, 2013 by Ánfer*

**math 11**

i dontget how the textbook got the answer, h = -30cos[(1.43)x]° + 40 the question is: a paintball is shot at a wheel of radius 40 cm. the paintball leaves a cricuarmark 10 cm from the outer edge of the wheel. As the wheel rolls, the mark moves in a circular motion.assuming ...
*December 13, 2010 by pranav*

**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?
*September 20, 2010 by annie*

**physics**

a mosquito lands on a small bicycle wheel 10.2cm from the wheels center. If the wheel turns clockwise so that the mosquito travels along an arc lenght of 9 cm what is the mosquitos angular displacement?
*July 22, 2014 by alysssa*

**physics**

A playground merry-go-round of radius 2.00 m has a moment of inertia I = 255 kg·m2 and is rotating about a frictionless vertical axle. As a child of mass 25.0 kg stands at a distance of 1.00 m from the axle, the system (merry-go-round and child) rotates at the rate of 14.0 rev...
*April 2, 2016 by jojo*

**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 ...
*November 4, 2012 by Janki Patel*

**physics**

a high speed sander has a disk of 2.74 cm in radius that rotates its disks about the axis at a constant rate of 503 rev/min. determine the linear speed of a point 2.33 cm from the disk's center. answer in units of m/s
*October 18, 2007 by Will*

**Physics**

A wheel with 50 cm diameter is moving at a speed of 20 m/sec. (a) How fast is the wheel turning? (b) How many revolutions will the wheel turn if it coasts uniformly to rest in 30 sec?
*November 25, 2011 by pakilina*

**Geometry**

A wheel turns at a rate of 12 turns every 5 seconds. If the wheel travels at a speed of 225 inches per second, what is the wheel's diameter?
*March 19, 2015 by Maddie*

**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 ...
*May 23, 2010 by Sarah*