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Rotational motion
Page 9
Questions (1,741)
A ballet student with her arms and a leg extended spins with an initial rotational speed of 0.90rev/s . As she draws her arms
4 answers
asked by
Please Help
2,551 views
A 24.5-kg child is standing on the outer edge of a merry-go-round which has moment of inertia 989 kg • m2 and radius 2.40 m.
2 answers
asked by
Anonymous
1,075 views
A student holds two lead weights, each of mass
12 kg. When the students’ arms are extended horizontally, the lead weights are
3 answers
asked by
d
687 views
A bicycle wheel has a diameter of 47.6 cm and a mass of 0.809 kg. The bicycle is placed on a stationary stand on rollers and a
4 answers
asked by
Youthers
968 views
A solid cylinder of mass 20 kg rotates about its axis with angular speed of 100 rad/sec. the radius of the cylinder is 0.25m.
3 answers
asked by
Devnet
721 views
two pulley rotate at 150 rpm and 300 rpm. the diameter of the larger pulley 15cm if the pulley are connected by belt . what is
3 answers
asked by
hitendra
528 views
A disk with mass m = 5.2 kg and radius R = 0.44 m hangs from a rope attached to the ceiling. The disk spins on its axis at a
3 answers
asked by
stewart
1,036 views
A person pushes on a doorknob with a force of 5N. The direction of the force is at an angle of 20 degrees from the perpendicular
3 answers
asked by
Max
921 views
A figure skater is spinning at a rate of 1.7 rev/s with her arms outstretched. She then draws her arms in to her chest, reducing
3 answers
asked by
femi
953 views
A rotating object starts from rest at t = 0 s and has a constant angular acceleration. At a time of t = 7.0 s the object has an
4 answers
asked by
vik
1,240 views
A solid cylinder is mounted above the ground with its axis of rotation oriented horizontally. A rope is wound around the
3 answers
asked by
Gina
1,128 views
a wheelof diameter 0.70 meterolls without slipping. a point at the top of the wheel moves with a tangential speed of 2.0
4 answers
asked by
Anonymous
2,476 views
It's possible for a body to have both rotational and translational motion at the same time.
True. << False. 2. The moment of
3 answers
asked by
Chelsea
786 views
A roller in a sheet-metal processing plant has a diameter of 1.77 m and a mass of 5871 kg. Assume the roller is a solid
3 answers
asked by
Tina
637 views
A disk in your computer spins at 5400 rpm. If this disk turns through 12 revolutions before coming to stop, find the disks
3 answers
asked by
Kayla
718 views
While waiting to board a helicopter, you notice that the rotor's motion changed from 340 rev/min to 265 rev/min in one minute.
3 answers
asked by
Anon
672 views
A space station is constructed in the shape of a hollow ring of mass 5.60 104 kg. Members of the crew walk on a deck formed by
3 answers
asked by
Hubert
892 views
Two wheels are rotating in such a way that the rotation of the smaller wheel causes the larger wheel to rotate. The radius of
3 answers
asked by
Katelyn
1,874 views
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).
3 answers
asked by
Laura
863 views
The flywheel of an engine has a moment of inertia of 24 kg*m^2.
a) if the radius of the wheel is 0.6m, what force is required to
1 answer
asked by
Natasha
458 views
Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space.
3 answers
asked by
Danny
1,220 views
A thin, uniform rod is hinged at its midpoint. To begin with, one half of the rod is bent upward and is perpendicular to the
3 answers
asked by
greg
1,914 views
In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be
3 answers
asked by
Anonymous
467 views
A ball of mass 0.1 kg is suspended vertically from the ceiling with a "massless" string and
brought to rest. The string is one
3 answers
asked by
Guy
1,474 views
A bicycle has wheels of radius 0.32 m. Each wheel has a roatational inertia of 0.080 kg•m^2 about its axle. The total mass of
3 answers
asked by
Anonymous
2,642 views
A coin rests 18.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface
2 answers
asked by
Anonymous
634 views
Find the angular velocity of a clock's second hand and the linear speed and linear acceleration of a point on the second hand
2 answers
asked by
Pat
510 views
13. The constant angular acceleration of a pulley is 4 rad/s2 and its angular speed its 3 rad/s. Determine the radius of the
4 answers
asked by
shivankar
1,277 views
A massless rod of length 1.00 m has a 2.00-kg mass attached to one end and a 3.00-kg mass attached to the other. The system
3 answers
asked by
tuni
2,379 views
A projected space station consists of a circular tube that will rotate about its center (like a tubular bicycle tire) as shown
2 answers
asked by
Mike Joseph
646 views
A model of a helicopter rotor has four blades, each 3.40 {m} in length from the central shaft to the tip of the blade. The model
1 answer
asked by
Kelly
465 views
A 1.4-m-long massless rod is pivoted at one end and swings around in a circle on a frictionless table. A block with a hole
3 answers
asked by
Anonymous
1,153 views
A uniform disk with a mass of 130 kg and a radius of 1.2 m rotates initially with an angular speed of 950 rev/min. A constant
4 answers
asked by
Amber
539 views
The angle through which a rotating wheel has turned in time t is given by \theta = a t - b t^2+ c t^4, where \theta is in
3 answers
asked by
Anonymous
1,995 views
What is the angular momentum (in kilogram-meter^2/second) of a 300.0 g ball rotating on the end of a string in a circle of
3 answers
asked by
Jessica
931 views
A weather vane initially at rest has a moment of inertia of 0.115 kg · m2 about its axis of rotation. A 44.5 g piece of clay is
3 answers
asked by
cindy
721 views
A high-speed sander has a disk 8.00 cm in radius that rotates about its axis at a constant rate of 1100 revolutions per minute.
4 answers
asked by
Joe
1,219 views
The string is pulled so that it accelerates at3 m/s^2. What is the angular acceleration of the wheel?
3 answers
asked by
Amy
1,043 views
Take the radius of the earth at the equator to be 6380 km
a. Find the speed the speed of an object at the equator due to the
3 answers
asked by
Sam
613 views
A boy of mass 23 kg sits on a seesaw 1.5 m from the axis of rotation. At what
distance from the axis of rotation must his friend,
4 answers
asked by
alex
1,546 views
A wheel of 40cm radius rotates on a stationary axle. It isuniformly speeded up from rest to a speed of 900 rpm in a time of20s.
3 answers
asked by
Anonymous
1,400 views
Two identical rollers are mounted with their axes parallel, in a horizontal plane, a distance 2d = 40.4 cm apart. The two
3 answers
asked by
Jennie
712 views
A phonograph record initially moving at 33 1/3 rpm accelerates uniformly to 45 rpm in 2.5 s. What is the angular distance
3 answers
asked by
Rebecca
758 views
A torque of 60 N*m acts on a wheel of moment of inertia 30 kg*m^2 for 5 s and then is removed.
a) What is the angular
3 answers
asked by
John
479 views
At t = 0 s a flywheel is rotating at 30 rpm. A motor gives it a constant acceleration of 0.9 rad/s^2 until it reaches 70 rpm.
2 answers
asked by
John
573 views
Two disks of identical mass but different radii (r and 2r) are spinning on frictionless bearings at the same angular speed ω0,
2 answers
asked by
Kayla
1,611 views
A rotating uniform cylindrical platform of mass 240 kg and radius 5.7 m slows down from 3.9 rev/s to rest in 16 s when the
3 answers
asked by
Ari
760 views
It has been suggested that rotating cylinders about 9 mi long and 5.1 mi in diameter be placed in space and used as colonies.
2 answers
asked by
Anonymous
479 views
A variable-speed drill, initially turning at 500 rpm, speeds up to 1300 rpm in a time interval of 0.8 s. What is its average
3 answers
asked by
danny
710 views
The speed of a point on a rotating turntable, which is 0.264 m from the center, changes at a constant rate from rest to 0.902
3 answers
asked by
squires
383 views
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