An electric sander consisting of a rotating disk of mass 0.7 kg and radius 10 cm rotates at 15 rev/sec. When applied to a rough wooden wall the rotation rate decreases by 20%. What is the final rotational kinetic energy of the rotating disk?

An electric sander consisting of a rotating disk of mass 0.7 kg and radius 10 cm rotates at 15 rev/sec. When applied to a rough wooden wall the rotation rate decreases by 20%. What is the final rotational kinetic energy of the rotating disk?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Related questions

Q: Big Ben has an hour hand shaped like a rod of length L = 2.70 m and uniform M = 70.0 kg. It rotates…

Q: A 14 lb bowling ball is thrown onto a lane with a backspin angular speed wo - 10 rad/s and forward…

A: The question asks for the work done by friction on the ball from the initial time until the time the…

Q: Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the…

Q: A 34 cm diameter circular saw blade has a mass of 0.95 kg, distributed uniformly as in a disk. What…

Q: A 2 kg ball with a radius of 0.35 meters is initially at rest. The rotational inertia equation for…

A: We know that Torque= Ta=Fr

Q: A 40-kg cylinder pulley with a radius of 0.2 m rotates at a constant angular speed of 4 rad/s. What…

A: mass of cylinder pulley (m) = 40 kg radius (r) = 0.2 m angular speed (ω) = 4 rads

Q: A solid sphere with a mass of 2 kg and a radius of 0.1 meters is rolling without slipping with a…

A: When an object rotates about an axis, it possesses kinetic energy due to its rotation.This is known…

Q: A solid sphere of uniform density is attached to a massless rod at the sphere’s surface, and is…

Q: A disk of mass 2.00 kg and radius 0.250 m is rolling (without slipping) across a floor with a linear…

A: A disk weighting 2 kg rolls without slipping across a floor with a speed of 5m/s Total kinetic…

Q: The mass of the earth is M = 6.0 × 1024 kg and its radius is R = 6.4 × 106 m. (a) Estimate the…

Q: A 35-kg child stands on the edge of a playground merry-go-round that has a radius of 2.1 m and a…

A: The mass of the child: The radius of the merry-go-round: The rotational inertia: The initial…

Q: A disk with an initial angular velocity = 9 rad/sec experiences a constant angular acceleration…

A: In the given question, We have to write the equation for the angular displacement of a point on the…

Q: A 50 kg solid disk (I = ½ mr2) with a radius of r starts from rest and rotates about an axis through…

A: Given: Mass of disk, M=50 kg Angular speed of disk, ω=16 rad/s Radius of disk, r=3.5 m Angular…

Q: 3 m 5 kg 6 kg 2 m 5 m 4 kg

A: Given: The masses of the objects are 4 kg, 5 kg, and 6 kg. The distance of the masses from the axis…

Q: A marble rolls down the track and around a loop-the-loop of radius 0.2 m. The marble has mass 59 g…

A: Given, mass of the marble, m=59 g radius of the marble, r=1.5 cm Radius of the loop, R=0.2 m

Q: A 150 g baseball is pitched at 36.54 m/s and spinning at 42 rad/s. You can treat the baseball as a…

Q: (a) How much work has the force done at the instant the disk has completed two revolutions, starting…

A: If the angular accleration is α and moment of inertia is I then the…

Q: A bus contains a 1420 kg flywheel (a disk that has a 0.64 m radius) and has a total mass of 10600…

A: The rotational kinetic energy of the flywheel can be expressed as: K_rot = (1/2) * I * w^2 where,I…

Q: Suppose a 175 kg motorcycle is heading toward a hill at a speed of 34 m/s. The two wheels weigh 12…

A: The objective of the question is to find out how high the motorcycle can coast up the hill without…

Q: Figure (a) shows a disk that can rotate about an axis at a radial distance h from the center of the…

A: As per the graph, Rotational inertia at h = 0, IA = 0.250 Kg m2 Here, h = 0 shows that IA is moment…

Q: A disk has a radius of 0.200 m and a mass of 2.00 kg. A torque of 0.240 Nm is applied to the disk.…

Q: disk-shaped motor component is running with angular velocity ω0=16.26 rad/s around its axis of…

Q: 5. A 2.5kg sphere with a radius of 35cm rotates on an axis through its center. A point on the edge…

A: Given: Mass of sphere is m=2.5kg Radius of sphere is r=35cm=0.35m tangential speed is v=10m/s

Q: What is her new angular velocity? rad/s. How much work must she do to draw her arms inwards? J.

Q: A cylinder of radius R = 20 cm is moving between two planks as shown in figure. There is no slipping…

A: Given:- A cylinder with the radius of R = 20 cm = 0.2 m There is no slipping at any point. Find:-…

Q: A blade with a 0.25 m radius starts from rest and rotates with an acceration 0f 0.25 rad/s2. What is…

A: The angular distance travelled is given by, Δθ=ω0t+12αt2 Here, ω0 is the initial angular speed, t is…

Q: You have two cylinders, both of mass m and radius r. One cylinder is solid and the other is hollow.…

A: Given that they both are rotting with same angular speed ωand rotational kinetic energy is given…

Q: A 4 kg ball with a 0.5 m radius rolls at a constant 4 rad/s. The rotational inertia of the ball is…

A: Given that,Mass, m=4 kgradius, r=0.5 mAngular velocity, ω=4 rad/sRotational Inertia,I=0.5 mr2We know…

Q: A machine has a rod-shaped steel blade that rotates about its center. The mass of the blade is 0.50…

Q: A 1.3-kg 20-cm-diameter solid sphere is rotating about its diameter at 62 rev/min. (a) What is its…

A: Given: The mass of the solid sphere is 1.3 kg. The diameter is 20 cm. The…

Q: The wheel has a mass of 10 kg and total radius of gyration of .15m. A force of 35 N is pulled as…

A: Angular acceleration is defined as the time rate of change of angular displacement with time. It is…

Q: A system of point particles is shown in the figure. Each particle has mass 1.0 kg and they all lie…

Q: rod of length 2.0 m and mass 4.00kg is at rest. The rod is rotated about its center so that it…

A: Given data Mass of rod is m=4.00 kg Length of the rod is l=2.0 m Initial angular speed is ω0=0…

Q: R19-5. The spool has a weight of 30 lb and a radius of gyration ko is applied to the cord at A,…

A: FBD of the diagram.

Q: A disk of mass 2.00 kg and radius 0.250 m is rolling (without slipping) across a floor with a linear…

Q: The angular speed of a particular cog in a machine is given by: w(t) = Kcos(2T) +M where K = 0.57…

A: Note: T=(9/2)s=4.5s

Q: Four particles, A, B, C, and D, are rotating around their individual axes of rotation with different…

A: The angular velocity is given by,

Q: Suppose a 175 kg motorcycle is heading toward a hill at a speed of 34 m/s. The two wheels weigh 12…

A: The objective of the question is to find out how high the motorcycle can coast up the hill without…

Q: A solid disc with the mass of 8 kg and radius R of 10 cm rolls smoothly in a path from rest down a…

A: Decrease in PE=Increase in rotational ξ translational K.E of the…

Q: A neutron star of mass 2.0 x 103° kg and radius 10 km rotates with a period of 0.02 seconds. What is…

Q: Two wheels of moment of inertia 9.8 kg.nf and 7.8 kg.nf are set in rotation with angular speed 2.9…

Q: An automobile wheel has a mass of 17 kg and a diameter of 0.25 m. What is the total kinetic energy…

A: KEtotal=KElinear+KErot=12mv2+12Iω2=12mv2+12mr22vr2=12mv2+14mv2=34mv2

Q: A disk of mass 3.8 kg and radius 0.17 m starts at the bottom of a 25 degree incline. It's…

Q: A solid disk has a radius of 0.084 m and a mass of 5.33 kg. What is the rotational kinetic energy of…

A: given solid disk of mass (m)=5.33kg And radius (r)=0.084m rate of rotation…

Q: A horizontal platform in the shape of a circular disk rotates on a frictionless bearing about a…

Question

An electric sander consisting of a rotating disk of mass 0.7 kg and radius 10 cm rotates at 15 rev/sec. When
applied to a rough wooden wall the rotation rate decreases by 20%. What is the final rotational kinetic energy
of the rotating disk?
Answer:

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

A spinning figure skater has a moment of inertia of 1.00 kgm- with her arms tucked close to her body and 1.25 kgm with her arms fully stretched. Her angular speed when her arms are tucked close to her body is 25 rad/s. What is her rotational kinetic energy with her arms fully stretched? O 250 J O 312,5 J O 275 J O 425 J
A disk of radius = 2.02 mm is attached to a high-speed drill at a dentist’s office and is turning at 96,185 rad/sec. Determine the tangential speed of a point on the outer edge of this disk. Use g=9.8
0.711T TIN A disk with rotational inertia of 0.25 kg m² and radius 0.24 m rotates about a frictionless axis that passes through the disk perpendicularly through its center. A force of 50 N is applied tangentially to the edge of the disk. If the disk starts its : movement from rest, after it has rotated half a revolution, its angular velocity is: a) w = 8.6831 rad/s b) w=17.3662 rad/s c) w = 327.2396 rad/s d) w =0.0754 rad/s
A circular disk has a rotational inertia of 1.4 kg.m? and a constant angular acceleration of 4.4 rad/s2. If it starts from rest the work done during the first 8.1 s by the net torque acting on it is:
A machine has a rod-shaped steel blade that rotates about its center. The mass of the blade is 0.75 kg and its length is 0.75 . Calculate its rotational kinetic energy when the blade has reached its operating speed of 4000 rpm.
A grindstone with a mass of 50 kg and radius 0.8 m maintains a constant rotation rate of 4.0 rev/s by a motor while a knife is pressed against the edge with a force of 5.0 N. The coefficient of kinetic friction between the grindstone and the blade is 0.8. What is the power provided by the motor to keep the grindstone at the constant rotation rate?
A jewel smith wishing to buff a finished piece of jewelry attaches a buffing disk to his drill. The radius of the disk is 4.30 mm, and he operates it at 2.50 104 rad/s. (a) Determine the tangential speed, in m/s, of the rim of the disk. m/s (b) The jeweler increases the operating speed so that the tangential speed of the rim of the disk is now 280 m/s. What is the period of rotation, in seconds, of the disk now? s
The spool has a mass, m, and a radius of gyration, kG. An inextensible is wrapped around the inner diameter of the spool and is attached to the wall a point A. The coefficient of friction between the floor and the spool is mu. If the spool has the initial angular velocity given as omega naught, how far will the center, G, move before stopping?
A disk of radius 0.5 m is rotating with constant angular acceleration around an axis passing through its center as shown in the figure. It starts rotation at r = 0 with an angular velocity of 10 rad/s/ After making 30 revolutions, its angular velocity becomes 100 rad/s. Find the tangential acceleration (in m/s) of a point P on the rim of the disk P R
12-the angular velocity of the spool with mass m and radius R varies over time with w(t) = 90e ^-0.02 t (rad/s). How many cycles does the reel do until it stops?
A jewel smith wishing to buff a finished piece of jewelry attaches a buffing disk to his drill. The radius of the disk is 4.10 mm, and he operates it at 2.25 104 rad/s. (a) Determine the tangential speed, in m/s, of the rim of the disk. m/s (b) The jeweler increases the operating speed so that the tangential speed of the rim of the disk is now 285 m/s. What is the period of rotation, in seconds, of the disk now? s
The graph below shows the the angular velocity w as a function of time t for a point on a rotating disk. 10- 8+ 6- 2- 0+ 2 3 t (s) The magnitude of the angular displacement of the disk from t = 0 s to t= 4 s, is most nearly O 40 rad O 16 rad O 24 rad O 32 rad w (rad/s) 4.