1. Physic

    An electric motor rotating a workshop grinding wheel at a rate of 114 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.10 rad/s2. (a) How long does it take for the grinding wheel to stop?

    asked by Anthony on November 14, 2011
  2. Physics

    An electric motor rotating a workshop grinding wheel at a rate of 95 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.40 rad/s2. (a) How long does it take for the grinding wheel to stop? (b) Through how

    asked by Dani on May 3, 2011
  3. physics

    An electric motor rotating a workshop grinding wheel at a rate of 9.80 101 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.00 rad/s2. (a) How long does it take for the grinding wheel to stop? s (b)

    asked by monic on November 14, 2012
  4. Physics

    An electric motor rotating a workshop grind- ing wheel at a rate of 147 rev/min is switched off with a constant deceleration of 1.24 rad/s2. How long does it take for the grinding wheel to stop? Answer in units of s Through how many radians has the wheel

    asked by Matthew on December 6, 2011
  5. GENERAL PHYSICS

    An electric motor rotating a grinding wheel at 100 rev/min is switched off. With constant negative angular acceleration of magnitude 2rad/second squared, how long does it take the wheel to stop?

    asked by HASTINGS on October 18, 2016
  6. 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)

    asked by a on March 16, 2013
  7. Physics

    an electric motor accelerates a grinding wheel at constant acceleration from 112 rev/min to 295 rev/min in 13 seconds. how many revolutions did it make in this time?

    asked by Anonymous on March 24, 2016
  8. physics

    A flywheel in the form of a heavy circular disk of diameter 0.83 m and mass 111 kg is mounted on a frictionless bearing. A motor connected to the flywheel accelerates it from rest to 1430 rev/min. a)What is the moment of inertia of the fly- wheel? Answer

    asked by phys101 on October 21, 2011
  9. Engineering Science

    The road wheel of a motor vehicle increases speed uniformly from 50 rev/min to 1100 rev/min in 40 seconds.calculate the angular acceleration of the wheel in rad/seconds squared,if the diameter of the wheel is 0.7 meters what is the linear acceleration of a

    asked by KUNDA C ANTHONY on November 6, 2018
  10. mechanics

    A turntable rotating at 78 rev/min slow down and stops in 32 second after the motor is turned off. a) Find its angular acceleration in rev/min^2. b)how many revolutions does it make in this this time

    asked by anaya on February 22, 2016
  11. Physics

    So the question I am doing has multiple parts. I was wondering how I should solve this and what formulas should be used. A grinding wheel of radius (.30cm) and mass 15 kg is spinning at a rate of 20.0 revolutions per second. When the power to the grinder

    asked by Bella on December 3, 2018
  12. Physic

    A vacuum pump is connected to its electric motor by a belt drive (Fig. 9-40, not to scale). The motor rotates at a rate of 1000 rev/min and the diameter of the motor shaft is 2.9 cm. How large (diameter) should the pulley be if it is designed for a speed

    asked by Anonymous on May 1, 2014
  13. Physics

    How does torque equal to ? " 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 exerting a radially inward force of 70 N.

    asked by Ánfer on October 30, 2013
  14. Physics

    A potter’s wheel of radius 53.13 cm and mass 106.4 kg is freely rotating at 47.1 rev/min. The potter can stop the wheel in 5.65 s by pressing a wet rag against the rim and exerting a radially inward force of 66.2 N. What is the angular acceleration of

    asked by JAYZ on November 8, 2013
  15. PHYSICS

    A grinding wheel 0.3m in diametre has amass of 5kg is rotating at an angular velocity of 2300rev/min.what is the kinetic energy?

    asked by Abeje on April 4, 2014
  16. PHYSICS

    A grinding wheel 0.3m in diametre has amass of 5kg is rotating at an angular velocity of 2300rev/min.what is the kinetic energy?

    asked by Anonym on April 4, 2014
  17. 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

    asked by Rajan on July 30, 2012
  18. physics

    The flywheel of a steam engine runs with a constant angular speed of 250 rev/min. When steam is shut off, the friction of the bearings stops the wheel in 2.1 h. At the instant the flywheel is turning at 75 rev/min, what is the tangential component of the

    asked by winterWX on March 12, 2007
  19. physical

    Afly wheel is making 180 rev/min and after 20s,its running at 120 rev/min.how many rev will it make and what time would ellapse before it stops. If the retartation is uniform

    asked by Sostine on May 31, 2011
  20. Physics

    A dc electric motor found in the lab was being examined by a student. It was connected to a power supply and it was not attached to any load. (a) The student stated, ‘when the motor is switched on, the electrical energy input should cause the motor to

    asked by Alfred on August 31, 2009
  21. Physics

    A flywheel with a diameter of 2.45 m is rotating at an angular speed of 74.1 rev/min. (a) What is the angular speed of the flywheel in radians per second? (b) What is the linear speed of a point on the rim of the flywheel? (c) What constant angular

    asked by kyle on November 9, 2011
  22. physics

    a wheel with an angular velocity of 300. rev/min increases to 500. rev/min in 10.0 sec. what is the angular acceleration the wheel is traveling?

    asked by sosa on January 20, 2014
  23. physics

    A constant torque of 20 N.m is applied to a wheel pivoted on a fixed axis. At what rate is power being furnished to the wheel when it is rotating at 0.5 rev/sec?

    asked by Maa on December 4, 2010
  24. Physics

    Calculate the rotational inertia of a wheel that has a kinetic energy of 41.6 kJ when rotating at 264 rev/min.

    asked by Emily on November 9, 2011
  25. physic

    hi,need help please.thank. A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 2.00 m and a mass of 525 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up

    asked by Chan on November 23, 2009
  26. physics

    A flywheel of moment of inertia 0.32 kgm^2 is rotated steadily at 120rad/s by a 50 W electric motor. (i)find the kinetic energy and angular momentum of the flywheel. (ii) calculate the value of frictional couple opposing the rotation. (iii)find the time

    asked by Edwin on March 26, 2010
  27. physics

    A potter's wheel having a radius 0.45 m and a moment of inertia of 14.9 kg · m2 is rotating freely at 49 rev/min. The potter can stop the wheel in 8.0 s by pressing a wet rag against the rim and exerting a radially inward force of 72 N. Find the effective

    asked by heather on December 1, 2012
  28. physics

    A car is designed to get its energy from a rotating flywheel with a radius of 1.50 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4000 rev/min. (a) Find the kinetic

    asked by mike on March 17, 2010
  29. Physics Rotaional Kinetic Energy

    A car is designed to get its energy from a rotating flywheel with a radius of 1.50 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4000 rev/min. (a) Find the kinetic

    asked by Anonymous on March 17, 2010
  30. physics

    hi,need help please.thank. A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 2.00 m and a mass of 525 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up

    asked by Chan on November 22, 2009
  31. physics

    A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4,000 rev/min. (a) Find

    asked by monic on November 30, 2012
  32. physics

    A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4,000 rev/min. (a) Find

    asked by heather on December 2, 2012
  33. physcs

    A potter's wheel having a radius 0.55 m and a moment of inertia 11.6 kg·m2 is rotating freely at 55 rev/min. The potter can stop the wheel in 8.0 s by pressing a wet rag against the rim and exerting a radially inward force of 66 N. Find the effective

    asked by Kelsey on April 17, 2010
  34. Physics

    An electric motor has 72 turns of wire wrapped on a rectangular coil, of dimensions 3cm by 4cm. Assume that the motor uses 14A of current and that a uniform 0.5T magnetic field exists within the motor. 1)What is the maximum torque delivered by the motor?

    asked by Belle on April 7, 2007
  35. 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

    asked by Beckles on April 6, 2015
  36. Physics

    The flywheel of a steam engine runs with a constant angular speed of 112 rev/ min . When steam is shut off, the friction of the bearings and the air brings the wheel to rest in 2.2 h. What is the magnitude of the constant angular acceleration of the wheel

    asked by Ted on April 2, 2014
  37. Physics

    A space station, in the form of a wheel 197 m in diameter, rotates to provide an “artificial gravity” of 2.5 m/s2 for persons who walk around on the inner wall of the outer rim. The rate of the wheel’s rotation in revolutions per minute that will

    asked by William on December 8, 2016
  38. physics

    A playground merry-go-round of radius R = 1.1 m has a moment of inertia of I = 280 kg*m^2. and is rotating at a rate of ω = 9 rev/min around a frictionless vertical axis. Facing the axle, a 37 kg child hops onto the merry-go-round and manages to sit down

    asked by matt on March 28, 2017
  39. Physics*

    A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 575 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 5,000 rev/min. (a) Find

    asked by Allie on October 20, 2011
  40. college physics

    The flywheel of a steam engine runs with a constant angular speed of 165 rev/min. When steam is shut off , the friction of the bearings and of the air brings the wheel to rest in 2.30 hrs (a) What is the constant angular acceleration of the wheel, in

    asked by Bami on June 8, 2010
  41. physics - drwls?

    The flywheel of a steam engine runs with a constant angular speed of 250 rev/min. When steam is shut off, the friction of the bearings stops the wheel in 2.1 h. At the instant the flywheel is turning at 75 rev/min, what is the tangential component of the

    asked by winterWX on March 13, 2007
  42. math

    A stepping motor with 200 steps angles ( = 200) is coupled to a leadscrew through a gear reduction of 5:1 (five rotations of the motor for each rotation of the leadscrew). The leadscrew has 2.4 threads/cm (which means the distance between two adjacent

    asked by dick on June 20, 2010
  43. Trigonometry

    Thank you for the respond!! I appreciate it. But it says on my paper 360 rev/min = 360 (2pi/60) rad/s = 12pi rad/s and so D= 2r = 2(s/theta) = 2(40/12pi) ft = 20/3pi ft = 2.12 ft should be the answer :( I have 2 more if that's alright. A point on the rim

    asked by Geee on November 10, 2017
  44. physics

    Calculate the rotational inertia of a wheel that has a kinetic energy of 24,400 J when rotating at 677 rev/min. I know that I = mr^2 and that T = Ia; also I calculated 677rpm to be 70.9 radians/sec. But I don't understand how to integrate KE into this.

    asked by james on February 5, 2017
  45. Physics

    Wheel A of radius ra = 13.9 cm is coupled by belt B to wheel C of radius rc = 34.3 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 5.7 rad/s2. At what time will wheel C reach a rotational speed of 168.2 rev/min,

    asked by Marc on February 10, 2012
  46. physic

    Wheel A of radius ra = 6.1 cm is coupled by belt B to wheel C of radius rc = 33.3 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 7.1 rad/s2. At what time will wheel C reach a rotational speed of 119.3 rev/min,

    asked by 12isabelle on September 20, 2010
  47. physic

    Wheel A of radius ra = 6.1 cm is coupled by belt B to wheel C of radius rc = 33.3 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 7.1 rad/s2. At what time will wheel C reach a rotational speed of 119.3 rev/min,

    asked by venuya on September 20, 2010
  48. physics

    Wheel A of radius ra = 14.6 cm is coupled by belt B to wheel C of radius rc = 30.2 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 5.0 rad/s2. At what time will wheel C reach a rotational speed of 52.9 rev/min,

    asked by Katie on March 3, 2012
  49. Physics Mehanics

    In the figure below, wheel A of radius rA = 11 cm is coupled by belt B to wheel C of radius rC = 23 cm. The angular speed of wheel A is increased from rest at a constant rate of 1.6 rad/s2. Find the time needed for wheel C to reach an angular speed of 110

    asked by D on February 24, 2011
  50. Physics

    I've been stuck on this problem for a while. Im not sure where to even begin. A bike wheel is rotating with an angular velocity of 3.1 rev/s. If the coefficient of kinetic friction between the wheel and brakes is .87, then find the revolutions the wheel

    asked by Ashley on April 21, 2011
  51. Physics

    A passenger bus in Zurich, Switzerland derived its motive power from the energy stored in a large flywheel. The wheel was brought up to speed periodically, when the bus stopped at a station, by an electric motor, which could then be attached to the

    asked by Suzy on November 4, 2008
  52. physics

    A potter's wheel is rotating around a vertical axis through its center at a frequency of 1.8rev/s . The wheel can be considered a uniform disk of mass 4.7kg and diameter 0.34m . The potter then throws a 3.1kg chunk of clay, approximately shaped as a flat

    asked by Joe on March 17, 2014
  53. Physics

    A record turntable rotating at 33 1/3 rev/min slows down and stops in 36s after the motor is turned off. (a) Find its (constant) angular acceleration in revolutions per minute-squared. (b) How many revolutions does it make in this time?

    asked by Anonymous on February 2, 2017
  54. Physics

    In a city with an air-pollution problem, a bus has no combustion engine. It runs on energy drawn from a large, rapidly rotating flywheel under the floor of the bus. The flywheel is spun up to its maximum rotation rate of 5150 rev/min by an electric motor

    asked by Brent on March 13, 2011
  55. Physics

    The flywheel of a steam engine runs with a constant angular speed of 321 rev/min (in the counterclockwise direction). When steam is shut off, the friction of the bearings stops the wheel in 1.9 h. (a) What is the constant angular acceleration, in

    asked by Anna on July 27, 2010
  56. physics

    A grinding wheel 0.40 m in diameter rotates at 2200 rpm. What is the acceleration of a point on the edge of the grinding wheel?

    asked by Eden on October 30, 2010
  57. physics

    A grinding wheel 0.40 m in diameter rotates at 2200 rpm. What is the acceleration of a point on the edge of the grinding wheel?

    asked by Corey on October 31, 2010
  58. physics

    A grinding wheel 0.28 m in diameter rotates at 2400 rpm. What is the acceleration of a point on the edge of the grinding wheel?

    asked by Cara on April 19, 2011
  59. physics

    A grinding wheel 0.40 m in diameter rotates at 2200 rpm. What is the acceleration of a point on the edge of the grinding wheel?

    asked by Eden on October 31, 2010
  60. physics

    a wheel is rotating at 30 rev/min. The angular velocity of the wheel is a. 2pi^2 rad/s b. 2pi rad/s c. 2 rad/s d. pi/2 rad/s e. pi rad/s explain please!

    asked by rory on December 14, 2008
  61. Physics 203

    A 1.3-kg 10-cm-diameter solid sphere is rotating about its diameter at 77 rev/min. (a) What is its kinetic energy? (b) If an additional 5.0 mJ of energy are supplied to the rotational energy, what is the new angular speed of the ball? rev/min

    asked by Kayla on April 6, 2011
  62. 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

    asked by greg on March 5, 2008
  63. Physics

    A piece of putty is initially located at point A on the rim of a grinding wheel rotating about a horizontal axis. The putty is dislodged from point A when the diameter through A is horizontal. The putty then rises vertically and returns to A the instant

    asked by Jessi on February 17, 2009
  64. 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

    asked by greg on March 5, 2008
  65. math

    1.A flywheel is rotating at 7 rad/sec. It has a 15-cm diameter. What is the speed of a point on its rim, in cm/min? 2.A wheel is rotating at 3 radians/sec. The wheel has a 30 cm radius. What is the speed of a point on its rim, in m/min? 3.What is the

    asked by rebecca on January 14, 2019
  66. math

    1. A flywheel is rotating at 7 rad/sec. It has a 15-cm diameter. What is the speed of a point on its rim, in cm/min? 2. A wheel is rotating at 3 radians/sec. The wheel has a 30 cm radius. What is the speed of a point on its rim, in m/min? 3. What is the

    asked by rebecca on January 9, 2019
  67. physics

    The flywheel of a steam engine runs with a constant angular speed of 164 rev/min. When steam is shut off, the friction of the bearings and the air brings the wheel to rest in 1.6 h. I figured out the constant angular acceleration=1.71 rev/min2 but im not

    asked by help on September 27, 2010
  68. Physics

    A spinning disk of mass 5.0 kg and radius 0.25m is rotating about an axis through its center at 400 rev/min. a.) What is the angular velocity of the disk in rad/s? b.) What is the moment of inertia of the disk? c.) If it accelerates at a constant rate to

    asked by Lauren on July 29, 2012
  69. physics

    A spinning disk of mass 5.0 kg and radius 0.25m is rotating about an axis through its center at 400 rev/min. a.) What is the angular velocity of the disk in rad/s? b.) What is the moment of inertia of the disk? c.) If it accelerates at a constant rate to

    asked by Lauren on July 29, 2012
  70. Physics

    Suppose a circular platform is rotating at a constant rate of 24 rev/min. How far away from the centre would one need to stand in order to have an radial acceleration of 9.9 m/s2? Express your answer in cm.

    asked by Sufian on October 17, 2010
  71. physic

    hi,need help please.thank. A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 2.00 m and a mass of 525 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up

    asked by Chan on November 22, 2009
  72. Physics

    A wheel of arduous 30 cm is rotating at a rate of 2.0 revolutions every 0.080 s. Through what angle, in radians, does the wheel rotate in 1.0 s? What is the linear speed of a point on the wheel's rim? What is the wheel's frequency of rotation?

    asked by Anonymous on October 9, 2012
  73. PHYSICS

    A grinding wheel with a 28cm diameter spins at a rate of 2020 revolutions per minute. What is the linear speed of the rim of the wheel?

    asked by blabla on September 9, 2015
  74. 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?

    asked by Britney on February 24, 2011
  75. math

    the wheel ( including the tire) of a sports car under development by one of the Big Three auto companies has an 11 in radius. what would be the car's speed in miles per hour if its wheel are turning 800 rpm? ------------------- 800 rev/ 1 min x 60 min/ 1

    asked by greeny on August 26, 2012
  76. physics

    A wheel has an angular speed of 85 rev/s when it experiences a constant angular acceleration of 100 rev/s2 which causes it to spin FASTER. During this time the wheel completes 26 rev. Determine how long the wheel was experiencing this angular acceleration.

    asked by help! on March 20, 2018
  77. physics

    The flywheel of a steam engine runs with a constant angular speed of 350 rev/min. When steam is shut off, the friction of the bearings stops the wheel in 1.0 h. A) At the instant the flywheel is turning at 75 rev/min, what is the tangential component of

    asked by Need help on February 2, 2017
  78. physics

    An electric motor runs at a constant rotational frequency of 3000 r/min and has the load of 75 Nm and a 5,0 Nm extra load of friction and gear. The efficiency of the motor is 78%. a) What is the input power of the motor? b) What is the work done by the

    asked by ade on September 16, 2014
  79. Physics

    An electric motor runs at a constant rotational frequency of 3000 r/min and has the load of 75 Nm and a 5,0 Nm extra load of friction and gear. The efficiency of the motor is 78%. a) What is the input power of the motor? b) What is the work done by the

    asked by Anonymous on August 25, 2016
  80. Physics

    A bicyclist starts from rest and accelerates at a constant rate for 15.0s. After 10.0s the bicycles front wheel is turning at a rate of 2.5 rev/s. The tire wheel has a diameter of 0.8m. A)Through how many revolutions does the wheel turn in the first 10.0s?

    asked by courtney on June 18, 2012
  81. science

    A grinding wheel with a 28cm diameter spins at rate of 2020 revolutions per minute. What is the linear speed of thge rim of the wheel?

    asked by blabla on September 8, 2015
  82. Physics

    A wheel is rotating with angular velocity 14 rev/s. What angular acceleration would be needed to bring the wheel to rest in a single rotation?

    asked by Mary on November 20, 2016
  83. physics

    A grinding wheel in the shape of a solid disk is 0.200 m in diameter and has a mass of 3.00 kg. The wheel is rotating at 2200 rpm about an axis through its center. (a) what is its kinetic energy? (b) How far would it have to drop in free fall to acquire

    asked by sarah on November 4, 2009
  84. physics

    What is the angular speed in rev/min of the Earth as it orbits around the sun? I'm confused with this problem. I know we have to convert from rad/s to rev/rad to s/min in order to get the units as rev/min. But I don't know what to use for rad/s

    asked by Priscilla on April 17, 2012
  85. physics

    The flywheel of a steam engine runs with a constant angular speed of 164 rev/min. When steam is shut off, the friction of the bearings and the air brings the wheel to rest in 1.6 h. I found the constant angular acceleration as 1.71rev/min^2. They also ask

    asked by help on September 28, 2010
  86. The basic principle of ore grinding process

    Lifting height and motion trail of projectile action of ore grinding medium depend on rotating speed of grinding machine and the filled amount of ore grinding medium. Both the low speed and high speed will have direct influence on the performance of

    asked by jiandan on August 10, 2012
  87. Physics

    Wheel A of radius ra = 13.9 cm is coupled by belt B to wheel C of radius rc = 34.3 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 5.7 rad/s2. At what time will wheel C reach a rotational speed of 168.2 rev/min,

    asked by Marc on February 10, 2012
  88. Physics: merry-go-round question

    A playground merry-go-round of radius 1.92 m has a moment of inertia 411 kg m2 and is rotating at 10.4 rev/min. A child with mass 38.3 kg jumps on the edge of the merry-go-round. Assuming that the boy's initial speed is negligible, what is the new angular

    asked by Tessa on April 26, 2010
  89. physics

    1. A centrifuge in a medical laboratory rotates at an angular speed of 3650 rev/min. When switched off, it rotates through 50.0 revolutions before coming to rest. Find the constant angular acceleration of the centrifuge. 2. A ball of mass 0.120 kg is

    asked by Elisa on July 6, 2008
  90. PHYSICS

    What is the angular momentum of a 2.7 kg uniform cylindrical grinding wheel of radius 12 cm when rotating at 1600 rpm? How much torque is required to stop it in 4.4 s?

    asked by Malin on November 29, 2010
  91. Physics

    What is the angular momentum of a 2.4 kg uniform cylindrical grinding wheel of radius 12 cm when rotating at 1800 rpm? How much torque is required to stop it in 4.0 s?

    asked by DL on December 10, 2009
  92. physics

    What is the angular momentum of a 2.43 kg uniform cylindrical grinding wheel of radius 12.5 cm when rotating at 1600 rpm? (b) How much torque is required to stop it in 8.00 s?

    asked by Anonymous on October 28, 2014
  93. physics

    When a 19.9 kg wheel with an angular speed of 3.10 rad/s is disconnected from a motor, a 0.124 N · m frictional torque slows the wheel to a stop. If the wheel has radius of 0.71 m, how long will it take for the wheel to come to rest after being

    asked by Alex on November 18, 2011
  94. trigonometry

    A Wheel of radius 14in. is rotating 0.5 rad/sec. What is the linear speed v, the angular speed in RPM ( rev per min), and the angular speed in deg/sec?

    asked by Dan on April 8, 2015
  95. 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 ?

    asked by David on March 29, 2014
  96. 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

    asked by sanjeev kumar on August 1, 2012
  97. trigonometry

    a wheel is rotating at 8 radians/sec, and the wheel has a 47 inch diameter. to the nearest foot, what is the velocity of a point on the rim in ft/min? all i know is that you have to use the formula v=r.w

    asked by y912f on January 7, 2009
  98. Dynamics

    A pelton wheel attains its operating speed of 800 rev/min% determine constant angular acceleration of pelton wheel

    asked by benny on July 30, 2012
  99. Physics

    A wheel free to rotate about its axis that is not frictionless is initially at rest. A constant external torque of +49 N·m is applied to the wheel for 16 s, giving the wheel an angular velocity of +685 rev/min. The external torque is then removed, and the

    asked by MUHAMMAD JUNAID on April 9, 2019
  100. PHYSICS

    A flywheel in the form of a heavy circular disk of diameter 0.83 m and mass 111 kg is mounted on a frictionless bearing. A motor connected to the flywheel accelerates it from rest to 1430 rev/min. a)What is the moment of inertia of the fly- wheel? Answer

    asked by PHYSICS HELP!!!!!!!!!!!!!!!! on October 21, 2011