A wheel turns through 90.0 revolutions in 15.0 sec. The angular speed at the end of this 15.0 sec period is 10.0 rev/s. Assuming that the angular acceleration is constant, calculate a) the angular speed at the beginning of the

48,785 results
  1. trigonometry

    The sprockets and chain of a bicycle are shown in the figure. The pedal sprocket has a radius of 4 in., the wheel sprocket a radius of 2 in., and the wheel a radius of 13 in. The cyclist pedals at 45 rpm. (a) Find the angular speed of the wheel sprocket.

  2. Math

    If a wheel turning at a constant rate completes 100 revolutions in 10 sec what is its angular speed?

  3. physics

    As a result of friction, the angular speed of a wheel changes with time according to d(theta)/dt = w0 e^-(aplpha*t) where w0 and alpha are constants. The angular speed changes from an initial angular speed of 4.87 rad/s to 4.27 rad/s in 33.93s. A)

  4. physics

    a fly wheel turns at 480rpm ,compute the angular speed at any point on the wheel and the tangential speed 30.0cm from the centre .

  5. physics

    A rotating wheel requires 7.00 s to rotate 28.0 revolutions. Its angular velocity at the end of the 7.00-s interval is 97.0 rad/s. What is the constant angular acceleration (in rad/s) of the wheel? rad/s2

  6. physics

    a remote controlled car's wheel accelerates at 22.4 rad/s^2. if the wheel begins with an angular speed of 10.8 rad/s what is the wheel's angular speed after exactly 3 full turns?

  7. Physics

    A wheel mounted on a stationary axle starts at rest and is given the following angular acceleration: 9-12t where t is the time after the wheel begins to rotate. Find the number of revolutions that the wheel turns before it stops ( and begins to turn in the

  8. Physics!

    A wheel rotates with a constant angular acceleration of 3.50 rad/s2. The angular speed of the wheel is 2.00 rad/s at t = 0. If the radius of the wheel is doubled, Are the following statements affected? If so, in what way? (Select all that apply.) (1)The

  9. physics

    The balance wheel of a watch oscillates with angular amplitude 1.7π rad and period 0.64 s. Find (a) the maximum angular speed of the wheel, (b) the angular speed of the wheel at displacement 1.7π/2 rad, and (c) the magnitude of the angular acceleration

  10. 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?

  11. Physics

    A spinning wheel is slowed down by a brake, giving it a constant angular acceleration of −4.60 rad/s2. During a 2.60-s time interval, the wheel rotates through 85.4 rad. What is the angular speed of the wheel at the end of the 2.60-s interval?

  12. Physics

    A bike wheel rotates uniformly through 2 revolutions in 3 seconds. a) what is the period of the wheel's rotation? T=3rev/2s=1.5s b) what is the frequency of the wheel's rotation? (in Hertz) f=1/T =1/1.5 =.666Hz c) what is the angular speed of the

  13. Physics

    A wheel turns through 90.0 revolutions in 15.0 sec. The angular speed at the end of this 15.0 sec period is 10.0 rev/s. Assuming that the angular acceleration is constant, calculate a) the angular speed at the beginning of the 15.0 sec interval, and b) the

  14. Physics

    A roulette wheel with a 1.0m radius reaches a maximum angular speed of 18 rad/s before it stops 35 revolutions ( 220 rad ) after attaining the maximum speed. How long did it take the wheel to stop? Unless you mean the 35 revs occur after max speed, it

  15. 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?

  16. physics

    When the string is pulled a distance of 40 cm in 2.50 s, the wheel turns though 5 revolutions. What is the average speed of the string, and what is the average angular velocity of the wheel? What is the radius of the wheel?

  17. physics

    A typical ten-pound car wheel has a moment of inertia of about 0.35 kg*m^2. The wheel rotates about the axle at a constant angular speed making 45.0 full revolutions in a time interval of 7.00 sec . What is the rotational kinetic energy of the rotating

  18. Physics(Please respond)

    A person is riding a bicycle, and its wheels have an angular velocity of 26.0 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 17.6 revolutions. (a) How much time does

  19. Physics

    An early method of measuring the speed of light makes use of a rotating slotted wheel. A beam of light passes through one of the slots at the outside edge of the wheel, travels to a distant mirror, and returns to the wheel just in time to pass through the

  20. physics, bike

    After fixing a flat tire on a bicycle you give the wheel a spin. Its initial angular speed was 6.50 and it rotated 15.2 revolutions before coming to rest.What was its average angular acceleration?

  21. Physics

    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

  22. 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

  23. physics

    A wheel is rotating at a rate of 2.2 revolutions every 3.5 s. Through what angle, in radians, does the wheel rotate in 1.0 Angular displacement=angularspeed*time angular speed has to be in radians/sec, and time in seconds.

  24. physics

    A remote-controlled car’s wheel accelerates at 22.7 rad/s. If the wheel begins with an angular speed of 11.0 rad/s, what is the wheel’s angular speed after exactly twenty full turns?

  25. Physics

    After fixing a flat tire on a bicycle you give the wheel a spin. Its initial angular speed was 7.35 rad/s and it rotated 15.0 revolutions before coming to rest. What was the average angular acceleration? For what length of time did the wheel rotate?

  26. PHYSICS--SHM

    PLZ HELP. THANKS. The balance wheel of a watch oscillates with an angular amplitude of rad and a period of 0.220 s. a) Find the maximum angular speed of the wheel. (b) Find the angular speed of the wheel when its displacement is /4 rad. (c) Find the

  27. 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

  28. physics

    A remote-controlled car’s wheel accelerates at 22.6 rad/s2. If the wheel begins with an angular speed of 10.6 rad/s, what is the wheel’s angular speed after exactly three full turns?

  29. math

    The Colossus ferris wheel at Six Flags St. Louis has a diameter of 50.3 m. A rider located on the circumference of the ferris wheel rotates at a speed of 16 km/h. (a) What is the angular speed of the ferris wheel, in rad/sec? (b) How long does it take for

  30. physics

    A typical ten-pound car wheel has a moment of inertia of about . The wheel rotates about the axle at a constant angular speed making 30.0 full revolutions in a time interval of 5.00 .

  31. Math

    A bicycle wheel is 30 inches in diameter. a. to the nearest revolution, how many times will the wheel turn if the bicycle is ridden for 3 miles. b. suppose the wheel turns at a constant rate of 2.75 revolutions per second. What is the linear speed in miles

  32. physics

    A tire placed on a balancing machine in a service station starts from rest and turns through 4.82 revolutions in 1.48 s before reaching its final angular speed. Calculate its angular acceleration.

  33. physics

    A tire placed on a balancing machine in a service station starts from rest and turns through 10.8 revolutions in 8.48 s before reaching its final angular speed. Calculate its angular acceleration.

  34. Physics

    A bicycle wheel of radius .7m is rolling without slipping on a horizontal surface with an angular speed of 2 rev/s when the cyclist begins to uniformly apply the brakes. The bicycle stops in 5s. Through how many revolutions did the wheel turn during the 5s

  35. college physics (inertia)

    As a result of friction, the angular speed of a wheel changes with time according to dθ/dt = ω0 *e^-(σ*t) where ω0 and σ are constants. The angular speed changes from an initial angular speed of 3.08 rad/s to 1.58 rad/s in 3.92 s. a)Determine the

  36. physics

    A typical ten-pound car wheel has a moment of inertia of about 0.35 kg*m^2. The wheel rotates about the axle at a constant angular speed making 45.0 full revolutions in a time interval of 7.00 sec . What is the rotational kinetic energy of the rotating

  37. Physics

    A rotating wheel requires 8.00 s to rotate 29.0 revolutions. Its angular velocity at the end of the 8.00 s interval is 95.0 rad/s. What is the constant angular acceleration of the wheel? (Do not assume that the wheel starts at rest.)

  38. Physics

    The angular velocity of a wheel is given by w = 3t^2 + 7t. a. What is the wheel’s initial angular velocity at t = 0? I think this should be zero but that seems too simple? b. What is the instantaneous angular acceleration (α) at t = 2 sec? Do I need to

  39. physics

    a stone tied to the end of string 80 cm long whirled in a horizontal circle with a constant speed the stone makes 14 revolutions in 25 sec a)what is the total angle in radian described by the stone in 25 sec b)find the angular speed of the stone? c)find

  40. 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

  41. Trigonometry

    A water wheel has a radius of 15 ft. A river passing through the water wheel turns the wheel at 11 revolutions per minute(rpm). What is the speed of the river in miles per hour?

  42. physics

    #1 An electric motor rotating a workshop grinding wheel at a rate of 231 rev/min is switched off. Assume constant angular deceleration of magnitude 1.87 rad/s^2 . Through how many revolutions does the wheel turn before it finally comes to rest? Answer in

  43. physics

    A tire placed on a balancing machine in a service station starts from rest and turns through 4.93 revolutions in 1.47 s before reaching its final angular speed. Calculate its angular acceleration. It must be in units of radians. Please help. I have 20

  44. physics

    a wheel turning with angular speed of 30 rps is brought to rest with constant acceleration. It turns 60 revolutions before it stops.

  45. 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

  46. 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

  47. Science

    A car is moving from rest .After 10 sec its wheel rotate 360 times in 1 minute. If the radius of the wheel is 50 cm, then find (1) angular acceleration and (2) angular velocity after 30 sec

  48. 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

  49. Physics

    A tire placed on a balancing machine in a service station starts from rest and turns through 4.71 revolutions in 1.29 s before reaching its final angular speed. Calculate its angular acceleration.

  50. physics

    A tire placed on a balancing machine in a service station starts from rest and turns through 4.82 revolutions in 1.48 s before reaching its final angular speed. Calculate its angular acceleration

  51. Physics- drwls please help

    A certain CD has a playing time of 80 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 x 10^2 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 x 10^2 rpm. Find the magnitude of the average

  52. Math

    10. Bicycle speedometers are programmed based on the number of revolutions the wheel turns per second. A bike wheel spins 480 times in 1 minute. What is the rate per second? a. 1 revolution per second b. 8 revolutions per second c. 60 revolutions per

  53. college physics (inertia)

    As a result of friction, the angular speed of a wheel changes with time according to dθ/dt = ω0 *e^-(σ*t) where ω0 and σ are constants. The angular speed changes from an initial angular speed of 3.08 rad/s to 1.58 rad/s in 3.92 s. a)Determine the

  54. college physics (inertia)

    As a result of friction, the angular speed of a wheel changes with time according to dθ/dt = ω0 *e^-(σ*t) where ω0 and σ are constants. The angular speed changes from an initial angular speed of 3.08 rad/s to 1.58 rad/s in 3.92 s. a)Determine the

  55. college

    A typical ten-pound car wheel has a moment of inertia of about 0.35 kg*m^2. The wheel rotates about the axle at a constant angular speed making 45.0 full revolutions in a time interval of 7.00 sec . What is the rotational kinetic energy of the rotating

  56. Physicss

    A torque of 77.7 Nm causes a wheel to start from rest, completes 5.55 revolutions and attains a final angular velocity of 88.8 rad/sec. What is the moment of inertia of the wheel? I am trying to find angular acceleration first. How do I find it given this

  57. physics

    wheel is spinning with angular speed 8.6 radian/sec.small fractional force on shaft causes a constant angular deacceleration and wheel come to rest in 192 sec.what is angular acceleration and total angle turned during the slow down

  58. 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?

  59. Physics

    A wheel on a moving car slows uniformly from 420 rpm to 120 rpm in 4 sec. A. What is the angular acceleration of the wheel? B. What is the angular displacement? How many revolutions? C. How far does the car travel if the radius of the wheel is 0.20cm?

  60. physic

    A wheel on a moving car slows uniformly from 420 rpm to 120 rpm in 4 sec. A. What is the angular acceleration of the wheel? B. What is the angular displacement? How many revolutions? C. How far does the car travel if the radius of the wheel is 0.20cm?

  61. science , physics

    A person is riding a bicycle, and its wheels have an angular velocity of +15.5 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is +15.5 revolutions. (a) How much time

  62. Physics

    An object initially rotating at an angular speed of 1.6 rad/sec turns through 30 revolutions during the time it experienced an angular acceleration of 0.32 rad/s^2. a) For how much time did the acceleration last? b) What was the final angular speed?

  63. physics

    A remote-controlled car’s wheel accelerates at 22.7 rad/s. If the wheel begins with an angular speed of 11.0 rad/s, what is the wheel’s angular speed after exactly twenty full turns?

  64. physics constant angular acceleration

    A wheel with radius 25.2 cm rotates with constant angular acceleration 3.75 rad/s2 (radians per second per second). If at t = 0 s, the angular speed of the wheel is 4.3 rad/s, how long does it take the wheel to complete 4 revolutions?

  65. mechanics

    A constant force of 40N is applied tangentally to the rim of a wheel with 20cm radius. The wheel has a moment of inertia 30kg.m2. Find (a)angular acceleration (b)angular speed after 4seconds from rest (c)the number of revolutions made in that 4 seconds

  66. Physics

    A wheel 1 meter in diameter is rotating at 100 revolutions per minute without slipping along a level stretch of road and passes mile marker 0 at 12:00 noon. it continues past mile marker 0 for 10 minutes and then has a period of angular acceleration of

  67. physics

    A rotating wheel requires 6.00 s to rotate 27.0 revolutions. Its angular velocity at the end of the 6.00-s interval is 97.0 rad/s. What is the constant angular acceleration (in rad/s) of the wheel?

  68. Physics

    An object initially rotating at an angular speed of 1.6 rad/sec turns through 30 revolutions during the time it experienced an angular acceleration of 0.32 rad/s^2 a) For how much time did the acceleration last? b) What was the final angular speed? Help

  69. Physics

    An object initially rotating at an angular speed of 1.6 rad/sec turns through 30 revolutions during the time it experienced an angular acceleration of 0.32 rad/s^2 a) For how much time did the acceleration last? b) What was the final angular speed? Help

  70. Radians

    The angular speed of a large pulley wheel that has a radius of 15, is 50 revolutions/min. Find the angular speed and the rim speed of the smaller wheel that has a radius of 5. The rim speed is going to be the same. I got the angular speed but I can't

  71. Physics

    A steel bicycle wheel (without the rubber tire) is rotating freely with an angular speed of 18.00 rad/s. The temperature of the wheel changes from -100.0 to +300.0 degrees Celcius. No net external torque acts on the wheel, and the mass of the spokes is

  72. Physics/Chemistry

    A steel bicycle wheel (without the rubber tire) is rotating freely with an angular speed of 18.00 rad/s. The temperature of the wheel changes from -100.0 to +300.0 degrees Celcius. No net external torque acts on the wheel, and the mass of the spokes is

  73. physics help please....

    After fixing a flat tire on a bicycle you give the wheel a spin. (a) If its initial angular speed was 5.17 rad/s and it rotated 10.6 revolutions before coming to rest, what was its average angular acceleration? rad/s2 (b) For what length of time did the

  74. Physics

    The combination of an applied force and a frictional force produces a constant total torque of 38.1 Nm on a wheel rotating about a fixed axis. The applied force acts for 7.00 s, during which time, the angular speed of the wheel increases from 2.40 rad/s to

  75. physics

    Suppose that a car wheel is spinning with angular velocity of wo. The car is then turned off and the wheel start to slow down because of friction and angular acceleration is constant. The wheel comes to rest after it has made X revolutions. What is the

  76. physics

    a wheel starts from rest and rotates with a constant angular acceleration and reaches an angular speed of 12 rad/sec in 3 sec. find the angle through which it rotates in this time.

  77. 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

  78. Math

    When wheel B turns 4 revolutions, wheel A turns 8 revolutions. When wheel A turns 56 revolutions, how many revolutions does wheel B turn?

  79. physics

    calculate the average angular acceleration and initial angular velocity of a wheel that has w=1.5wo(initial omega) at the end of 1min and w=45rev/sec at the end of 3min

  80. 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

  81. Trigonometry

    A water wheel has a radius of 15 ft. A river passing through the water wheel turns the wheel at 11 revolutions per minute(rpm). What is the speed of the river in miles per hour?

  82. Dynamics

    A pelton wheel attains its operating speed of 800 rev/min within 2s after it is turn on. Determine the constant angular accelerations of pelton wheel. also find the total number of revolutions the wheel makes before it attains operating speed

  83. 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

  84. physics

    A tire placed on a balancing machine in a service station starts from rest and turns through 4.82 revolutions in 1.48 s before reaching its final angular speed. Calculate its angular acceleration.

  85. Physics(Please help)

    A person is riding a bicycle, and its wheels have an angular velocity of 26.0 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 17.6 revolutions. (a) How much time does

  86. physics

    After fixing a flat tire on a bicycle you give the wheel a spin. (a) If its initial angular speed was 5.41 rad/s and it rotated 13.7 revolutions before coming to rest, what was its average angular acceleration?

  87. physics

    The motor of a fan turns a small wheel of radius rm = 1.60 cm.This wheel turns a belt, which is attached to a wheel of radius rf = 2.90 cmthat is mounted to the axle of the fan blades. Measured from the center of this axle, the tip of the fan blades are at

  88. PHYSICS

    A solid disk with a mass of 100kg and a radius of 0.2m, turns clockwise through an angular displacement 10 rad when starting from rest to attain its maximum angular speed, of 1 revolution every 0.5s. What is the angular acceleration that the wheel

  89. Physics

    A solid disk with a mass of 100kg and a radius of 0.2m, turns clockwise through an angular displacement 10 rad when starting from rest to attain its maximum angular speed, of 1 revolution every 0.5s. What is the angular acceleration that the wheel

  90. 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

  91. 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

  92. physics

    A wheel has an initial velocity of 3.40rad/s and it rotates 1.25 revolutions before stopping what is the angular acceleration of the wheel how long does it take for the wheel to come to rest

  93. 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

  94. physics

    A person is riding a bicycle, and its wheels have an angular velocity of +15.5 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is +15.5 revolutions. (a) How much time

  95. Physics Angular displacement

    A car is traveling with a speed of 25 m/s along a straight, horizontal road. Each wheel has a radius of .25 m. If the car speeds up with a linear acceleration of 2.0 m/s^2 for 6.0 s. Find the angular displacement of each wheel during this time in

  96. science- physics

    A rotating wheel requires 4.17 s to rotate through 37 rev. Its angular speed at the end of the 4.17 s interval is 104 rad/s. What is its constant angular acceleration? Assume the angular acceleration has the same sign as the angular velocity.

  97. physics

    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

  98. 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

  99. 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

  100. 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?

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