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Rotational motion
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Questions (1,743)
An electric motor is attached to a small wheel that is rotating at a rate of 150 rev \min . if the motor is switched off so that
2 answers
asked by
Rama ^_^
110 views
Two ice skaters hold hands and rotate, making one revolution in 7.6 s. Their masses are 15 kg and 50 kg, and they are separated
5 answers
asked by
Amber
5,177 views
A drum (see Figure 10.2) has a radius of 0.40 m and a moment of inertia of 2.3 kg ∙ m2. The frictional torque of the drum axle
4 answers
asked by
anthony
2,277 views
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
4 answers
asked by
Diane M.
1,694 views
You are a 70kg astronaut floating at rest in zero gravity holding your laptop. Your hard drive turns on (increasing from 0 to
2 answers
asked by
anonymous
674 views
A certain CD has a playing time of 72 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102
2 answers
asked by
nn
1,332 views
A 12.1 g CD with a radius of 6.16 cm rotates with an angular speed of 31.1 rad/s. What is its kinetic energy?
4 answers
asked by
Megan
1,536 views
A solid disk (mass = 1 kg, R=0.5 m) is rolling across a table with a translational speed of 9 m/s.
a.) What must the angular
4 answers
asked by
kelsey
534 views
A turntable reaches an angular speed of 33.3 rpm, in 2.0 s, starting from rest.
(a) Assuming the angular acceleration is
3 answers
asked by
Megan
3,826 views
A flywheel rotating at 5.3 revolutions per second has an angular retardation of 4/5 radian per second per
1 answer
asked by
dan
506 views
A string is wrapped around the rim of a flywheel 0.400 m in radius, and a steady pull of 50.0 N is exerted on the cord. The
3 answers
asked by
Sunny
1,102 views
If the mine winch drum diameter is 6m calculate how far the counterweight will fit for each single rotation of the drum
29 answers
asked by
dimpho
17,481 views
It is desired that the outer edee of a grindine wheel 9.0 cm in radius move at a rate of 6.0 m/s. (a) Determine the angular
4 answers
asked by
Hajara
92 views
A coin sits 0.10m from the center of a
record player spinning at 45rpm. a) What is the frequency in Hertz?
4 answers
asked by
Mike
101 views
A cylinder with moment of inertia I1 rotates with an angular velocity wo abouta vertical, frictionless axle. A second cylinder
1 answer
asked anonymously
83 views
The system of small object is rotating at 2rad/s. If the object are connected by small light spokes that can be lengthened or
2 answers
asked anonymously
80 views
Determine the moment of inertia for three teenagers weighing 60.0 kg, 45.0 kg, and 80.0 kg sitting at different points on the
2 answers
asked by
^_^
147 views
Assume that the Earth is a solid sphere of constant density, with mass 5.98 × 1024 kg and radius 6370 km.
What is the moment of
2 answers
asked by
Rama ^_^
78 views
An airplane propeller slows from 14 rad/s to 1.3 rad/s as the propeller completes 14 revolutions. Find the angular acceleration
2 answers
asked by
Rama ^_^
91 views
An airplane propeller slows from 14 rad/s to 1.3 rad/s as the propeller completes 14 revolutions. Find the angular acceleration
2 answers
asked by
Rama ^_^
108 views
An airplane propeller slows from 14 rad/s to 1.3 rad/s as the propeller completes 14 revolutions. Find the angular acceleration
1 answer
asked by
Rama ^_^
117 views
which of the following is not a unit of rotational ,speed?
a)meter per second b)revolutions per minute c) revolutions per second
4 answers
asked by
Rama ^_^
63 views
an object completes 1.5 circular in half a minute. what is it's angular velocity?
1 answer
asked by
Rama ^_^
40 views
which of the following is not a unit of rotational speed ?
a)meters per second b)revolutions per minute c)revolutions per second
1 answer
asked by
Rama ^_^
62 views
which would have a greater linear velocity ?
A)kid near the center of the merry go round B)kid near the outside of the merry go
1 answer
asked by
Rama ^_^
69 views
A cylinder with moment of inertia I1 rotates with an angular velocity Wo about a vertical frictionless axle. Asecond cylinder
1 answer
asked anonymously
80 views
A horizontal plat form in the shap of a circular disk rotates in a horizontal plane about a frictionless vertical axle. The plat
7 answers
asked anonymously
130 views
The system of small object is rotating at 2rad/s. If the object are connected by small light spokes that can be lengthened or
1 answer
asked anonymously
84 views
The resistance of an object to change its rotational
motion about an axis is
2 answers
asked anonymously
59 views
A disk initially at rest is given an angular
acceleration of 12rad/s. What is its frequency after 10 seconds?
2 answers
asked anonymously
41 views
A small block placed on the surface of a horizontal disc at a point 6 cm from the centre of the disc .The block is on the point
2 answers
asked by
Sandra
54 views
A car is traveling at 34 miles per hour. If its tires have a diameter of 14 inches, how fast are the car’s tires turning?
4 answers
asked by
EBB
1,573 views
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
3 answers
asked by
Anonymous
974 views
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
4 answers
asked by
Dan
4,544 views
A car leaves an intersection after a light turns green. It starts from rest and reaches a speed of 13.4 m/s in 5.0 s. The radius
4 answers
asked by
clara
2,340 views
Just after a motorcycle rides off the end of a ramp and launches into the air, its engine is turning counterclockwise at 7530
3 answers
asked by
Anonymous
1,906 views
A uniform spherical shell of mass M and radius R rotates about a vertical axiss on frictionless bearings. A massless cord passes
4 answers
asked by
Kristen
1,479 views
Sorry I've tried 3 different ways to answer this and all have been wrong, please help me out!
The moment of inertia of a 1.1 kg
6 answers
asked by
Sally
1,218 views
An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its
2 answers
asked by
dmkp
536 views
A ceiling fan is turned on and a net torque of 1.6 N·m is applied to the blades. The blades have a total moment of inertia of
5 answers
asked by
yoni
2,902 views
A 0.500 kg wheel that has a moment of inertia of 0.015 kg m^2 is initially turning at 30 rev/s. it starts to rest after 163
4 answers
asked by
krisna
2,908 views
A 500 N weight is attached to a stiff rod of negligible weight that is hinged to one end. The rod is released from rest in
3 answers
asked by
Mac
990 views
A ball of mass m is attached by two strings to a vertical rod. as shown above. The entire system rotates at constant angular
3 answers
asked by
tammy
2,797 views
if a skater is rotating a spin at a constant angular velocity at 2.5 rad/s for 1.1s, what is the angular acceleration?
3 answers
asked by
anna
771 views
A wheel of radius 0.43 m spins at a rate such that a point on the rim of the wheel has an acceleration of 43 m/s^2. How many
1 answer
asked by
Anonymous
136 views
A wheel starts from rest and has an angular acceleration of 4.0 rad/s^(2). When it has made 10 rev its angular velocity is:
5 answers
asked by
jay
5,581 views
Calculate the rotational inertia of a meter stick, with mass 0.58 kg, about an axis perpendicular to the stick and located at
9 answers
asked by
Ryan
1,776 views
A Ferris wheel 28.0m in diameter rotates once every 21.0s.
What is the ratio of a person's apparent weight to her real weight at
4 answers
asked by
Confused
1,347 views
A long thin rod of mass M=2.00 kg and length L=75.0 cm is free to rotate about its center. Two identical masses (each of mass m
4 answers
asked by
Miki
2,866 views
If the mine winch drum diameter is 6m , calculate how far the cage will drop for single rotation of the drum
4 answers
asked by
Samkele
1,531 views
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