Thursday

December 8, 2016
Number of results: 6,266

**physics**

A 49.7-cm diameter disk rotates with a constant angular acceleration of 2.7 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time.

*October 23, 2010 by Anonymous*

**Plane Trigonometry**

A compact disk is 12 cm in diameter & rotates at 100 rpm when being played. The hole in the center is 1.5 cm in diameter. Find the speed in cm/min of a point on the disk & the speed of a point on the inner edge.

*January 4, 2011 by Willoby*

**physics**

A 44.3-cm diameter disk rotates with a constant angular acceleration of 2.3 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. (a) Find the ...

*November 5, 2009 by josh*

**Physics 1**

The hard disk in a laptop computer contains a small disk that rotates at a rate of 5000 rpm. If this disk has a radius of 2.3 cm, what is the centripetal acceleration of a point at the edge of the disk?_____m/s^2

*October 3, 2012 by John *

**Physics 1**

The hard disk in a laptop computer contains a small disk that rotates at a rate of 5000 rpm. If this disk has a radius of 2.3 cm, what is the centripetal acceleration of a point at the edge of the disk?_____m/s^2

*October 4, 2012 by John *

**physics**

A compact disk player has just been turned off. A disk decelerates uniformly from an initial angular velocity of 7.90 rev/s. The disk rotates through 5.50 revolutions before coming to rest. What is the tangential acceleration of a point on the disk 5.05 cm from the axis?

*March 24, 2014 by Anonymous*

**phys**

A disk with a rotational inertia of 2.0 kg.m^2 and a radius of 0.40 m rotates on a frictionless fixed axis perpendicular to the disk faces and through its center. A force of 5.0 N is applied tangentially to the rim. The angular acceleration of the disk is:

*May 1, 2014 by jay*

**physics**

A disk with a rotational inertia of 1.4 kg×m2 and a radius of 0.8 m rotates on a frictionless fixed axis perpendicular to the disk faces and through its center. A force of 5.2 N is applied tangentially to the rim. The angular acceleration of the disk is:

*December 31, 2015 by Ahmad*

**physics**

A thick, vertical iron pipe has an inner diameter of 0.070 m. A thin aluminum (α = 23x10-6 (C°)-1) disk, heated to a temperature of 89°C, has a diameter that is 4.4x10-5 m greater than the pipe's inner diameter. The disk is laid on top of the open upper end of the pipe...

*June 14, 2015 by ashley*

**Physics**

A compact disk rotates from rest to 500 rev/min. in 5.5s. a) What is the angular acceleration assuming it is constant. b) How many revolutions does the disk make in 5.5 s. c) How far does a point on the rim 6 cm from the center of the disk traveling during the 5.5 s.

*April 4, 2013 by Jenny*

**Physics 1**

A disk rotates with constant angular acceleration. The initial angular speed of the disk is 2π rad/s. After the disk rotates through 17π radians, the angular speed is 18π rad/s. (a) What is the magnitude of the angular acceleration? answer in rad/s2 (b) How much...

*October 2, 2014 by Nat*

**physics**

A uniform circular disk of mass 24.0 g and radius 40.0 cm hangs vertically from a fixed, frictionless, horizontal hinge at a point on its circumference. A horizontal beam of electromagnetic radiation with intensity 10.0 MW/m2 is incident on the disk in a direction ...

*September 21, 2015 by theo*

**Physics**

Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 6.00 s, it rotates 28.0 rad. During that time, what are the magnitudes of (a) the angular acceleration and (b) the average angular velocity? (c) What is the instantaneous angular ...

*November 25, 2011 by S.Jacob*

**physics**

A thin, light horizontal string is wrapped around the rim of a 4.00-kg solid uniform disk that is 30.0 cm in diameter. A box is connected to the right end of the string and moves to the right along the ground horizontally with no friction. The box is subjected to a horizontal ...

*December 4, 2012 by toby*

**physics**

The 17.9 cm diameter disk rotates on an axle through its center. F1=22.1 N, F2=32.4 N, F3=32.4 N, F4=22.1 N, and d=4.74 cm. What is the net torque about the axle?

*October 12, 2008 by Sara*

**physics**

The 17.9 cm diameter disk rotates on an axle through its center. F1=22.1 N, F2=32.4 N, F3=32.4 N, F4=22.1 N, and d=4.74 cm. What is the net torque about the axle?

*October 15, 2008 by Adam*

**Physics**

A penny is placed at the outer edge of a disk (radius = 0.159 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.50 s. Find the minimum coefficient of friction necessary to allow the penny to rotate along with ...

*February 20, 2012 by Jessica*

**Physics**

A penny is placed at the outer edge of a disk (radius = 0.159 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.50 s. Find the minimum coefficient of friction necessary to allow the penny to rotate along with ...

*February 20, 2012 by Jessica*

**physics**

A penny is placed at the outer edge of a disk (radius = 0.119 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.70 s. Find the minimum coefficient of friction necessary to allow the penny to rotate along with ...

*February 23, 2014 by Anonymous*

**Physics Help**

A 3.50-inch floppy disk in a computer rotates with a period of 2.02E-1 s. What is the angular speed of the disk?

*November 30, 2012 by Na*

**physics**

a penny is placed at the outer edge of a disk(radius =0.150m) that rotates about its axis perpendicular to the plane of the disk at its center. the period of rotation is 1.80s. find the minimum coefficient friction necessary to allow the penny to rotate along with the disk

*October 22, 2014 by Anonymous*

**Physics**

A solid disk rotates in the horizontal plane at an angular velocity of 0.034 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.11 kg·m2. From above, sand is dropped straight down onto this rotating disk, so that a ...

*August 16, 2011 by Kristi*

**Physics**

A solid disk rotates in the horizontal plane at an angular velocity of 0.036 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.17 kg · m2. From above, sand is dropped straight down onto this rotating disk, so that a ...

*November 1, 2011 by jason*

**physics**

A solid disk rotates in the horizontal plane at an angular velocity of 0.040 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.13 kg·m2. From above, sand is dropped straight down onto this rotating disk, so that a ...

*November 16, 2014 by bob*

**Physics **

A solid disk rotates in the horizontal plane at an angular velocity of 0.0653 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.156 kg·m2. From above, sand is dropped straight down onto this rotating disk, so that a ...

*February 23, 2016 by Physic*

**Physics**

A solid disk rotates in the horizontal plane at an angular velocity of 0.0684 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.190 kg·m2. From above, sand is dropped straight down onto this rotating disk, so that a ...

*March 3, 2016 by Anna*

**science **

A uniform disk with radius 0.320m and mass 28.0kg rotates in a horizontal plane on a frictionless vertical axle that passes through the center of the disk. The angle through which the disk has turned varies with time according to è(t)= (1.20rad/s)t + (8.70rad/s^2)t^2 my ...

*June 9, 2014 by Mona*

**physics**

A 4.0 kg, 36-cm-diameter metal disk, initially at rest, can rotate on an axle along its axis. A steady 5.5 N tangential force is applied to the edge of the disk. What is the disk's angular velocity, in rpm, 4.0 s later?

*November 30, 2016 by Nathan*

**Physics**

A steady horizontal force F if magnitude 21N is apllied at the axle of a solid disk. the disk has mass 2.0kg and diameter of 0.10m. What is the linear speed of the center of the disk after it has moved 12m?

*February 18, 2008 by Nick*

**physics**

A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. The disk has a mass of 240 kg and a radius of 1.4 m. A 33- kg child rides at the center of the merry-go-round while a playmate sets it turning at 0.20rpm. If the...

*November 18, 2009 by kate*

**Physics**

A children merry go round in the consist of 300 kg solid horizontal disk of radius 8.5 m. It rotates at a speed of .25 revolution per second while a person of mass 150 km takes a ride at the edge of the disk. How fast will the disk be rotating if the person walks 4m along the ...

*December 14, 2013 by Tsunayoshi*

**Physics**

A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. The disk has a mass of 240 kg and a radius of 1.4 m. A 33- kg child rides at the center of the merry-go-round while a playmate sets it turning at 0.20rpm. If the...

*November 19, 2009 by Rachel*

**physics**

A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. The disk has a mass of 210 kg and a radius of 1.8 m. A 35- kg child rides at the center of the merry-go-round while a playmate sets it turning at 0.10rpm. If the...

*November 23, 2009 by john*

**Physics **

A turntable with a moment of inertia of 0.017 kg*m^2 rotates feely at 3.3 rad/s. A circular disk of mass 240 g and diameter 26 cm, and initially not rotating, slips down a spindle and lands on the turntable.

*December 4, 2011 by John*

**physics**

A thin, light string is wrapped around the rim of a 4.00kg solid uniform disk that is 30.0cm in diameter. A person pulls on the string with a constant force of 100N tangent to the disk. Find the linear acceleration of its center of mass. If the disk is replaced by a hollow ...

*April 12, 2008 by Erin*

**Calc Physics**

A disk with a mass of 17 kg, a diameter of 25 cm, and a thickness of 8 cm is mounted on a rough horizontal axle as shown on the left in the figure. (There is a friction force between the axle and the disk.) The disk is initially at rest. A constant force, F = 70 N, is applied ...

*February 20, 2013 by Dehia*

**Physics**

A coin is placed on a large disk which rotates uniformly at a rate of 2 rot/s. The coefficient of friction between the coin and the disk is 0.1. To what distance from the center of the disk should the coin be placed so that the coin may not slip? I know that mu times g (.1 x 9...

*November 8, 2014 by Anonymous*

**Physics**

A floor polisher has a rotating disk that has an 11-cm radius. The disk rotates at a constant angular velocity of 1.1 rev/s and is covered with a soft material that does the polishing. An operator holds the polisher in one place for 43 s, in order to buff an especially scuffed...

*October 15, 2014 by Anon*

**PHYSICS**

A constant torque of 30m⋅N is applied to the rim of a 6.0-kg uniform disk of radius 0.20m .What is the angular speed of the disk about an axis through its center after it rotates 2.0 revolutions from rest?

*June 3, 2015 by dan*

**maths-help please?**

A cicular opaque disk, 25cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. A screen is placed 30cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen.

*August 30, 2012 by Sab*

**physics**

a floor polisher has a rotating disk that has a 15cm radius the disk rotates at a constant angular velocity of 1.4rev/s and is covered with a soft material that does the polishing. An operator holds the polisher in place for 45s, in order to beff an especially scuffed area of ...

*October 22, 2014 by Anonymous*

**Physic**

A machine part is made from a uniform solid disk of radius R = 0.161 m and mass M = 7.75 kg. A hole of radius R/2 is drilled into the disk, with the center of the hole at a distance R/2 from the center of the disk (the diameter of the hole spans from the center of the disk to ...

*November 28, 2011 by jean*

**Physics**

A disk rotates on the horizontal. A blcok is hanging from the tisc, which forms an angle with the vertical of 45 degrees while the disk turns. The radius of the disc is .1mm and the length of the string is .06 m. Determine the velocity of rotation for the system.

*November 9, 2012 by Leslie*

**Physics**

A disk rotates on the horizontal. A blcok is hanging from the tisc, which forms an angle with the vertical of 45 degrees while the disk turns. The radius of the disc is .1mm and the length of the string is .06 m. Determine the velocity of rotation for the system.

*November 11, 2012 by Krystina*

**maths/physics**

Please I need some help with this question A cicular opaque disk, 25cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. A screen is placed 30cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen.

*August 30, 2012 by Sab*

**Physics**

Consider the rods plus disc system shown in the Figure. The rod has a length L =0.50 m, and mass M = 0.270kg. The large disc has a radius of R = 0.130m and mass m=0.810kg. The second disk should be treated as a point mass of 0.405kg. It is glued to the rod at position X = 0....

*November 3, 2014 by Serena*

**Physics**

A machine part is made from a uniform solid disk of radius R and mass M. A hole of radius R/2 is drilled into the disk, with the center of the hole at a distance R/2 from the center of the disk (the diameter of the hole spans from the center of the disk to its outer edge). ...

*October 24, 2011 by mymi*

**Physics**

A turntable with a moment of inertia of 0.029 kg*m^2 rotates feely at 2.8 rad/s. A circular disk of mass 270 g and diameter 20 cm, and initially not rotating, slips down a spindle and lands on the turntable. a) Find the new angular speed. b) What is the change in kinetic energy?

*May 10, 2011 by Unknown*

**Physics**

A turntable with a moment of inertia of 0.017 kg*m^2 rotates feely at 3.3 rad/s. A circular disk of mass 240 g and diameter 26 cm, and initially not rotating, slips down a spindle and lands on the turntable. a) Find the new angular speed. b) what is the change in kinetic energy?

*December 4, 2011 by John*

**Physics**

A disk with a mass of 13 kg, a diameter of 25 cm, and a thickness of 8 cm is mounted on a rough horizontal axle as shown on the left in the figure. (There is a friction force between the axle and the disk.) The disk is initially at rest. A constant force, F = 70 N,is applied ...

*October 25, 2010 by Donny*

**maths**

please help A circular opaque disk, 25 cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. A screen is placed 30 cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen

*August 27, 2012 by SABRINA*

**maths**

Can someone help please? A circular opaque disk, 25 cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. A screen is placed 30 cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen

*August 27, 2012 by Sabrina*

**maths/physics**

Need help..... A circular opaque disk, 25 cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. A screen is placed 30 cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen

*August 28, 2012 by Sab*

**physics**

a high speed sander has a disk of 2.74 cm in radius that rotates its disks about the axis at a constant rate of 503 rev/min. determine the linear speed of a point 2.33 cm from the disk's center. answer in units of m/s

*October 18, 2007 by Will*

**PHYSICS**

A 54.0-cm diameter disk rotates with a constant angular acceleration of 2.0 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. Find the position ...

*July 13, 2011 by Kevin*

**Physics**

A 46.5-cm diameter disk rotates with a constant angular acceleration of 2.4 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. (Hint: Remember ...

*November 30, 2009 by Ed*

**Physics**

A 46.5-cm diameter disk rotates with a constant angular acceleration of 2.4 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. (Hint: Remember ...

*November 28, 2009 by Ed*

**physics**

What is the tangential acceleration of a bug on the rim of a 12.0 in. diameter disk if the disk moves from rest to an angular speed of 75 rev/min in 4.0 s?

*November 21, 2009 by lynette*

**physics**

20 kg , 30 cm diameter disk is spinning at 300 rpm. How much friction force must be applied to rim to bring the disk to a halt in 3.0s?

*December 15, 2010 by Justin*

**physics**

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. Determine the angular speed of the disk in radians per second.

*March 7, 2012 by Joe*

**physics sir damon help**

a uniform disk of moment of inertia 75kgm^2 and radius of gyration 3m rotates with an angular velocity of 2rad/s. determine d : mass , radius , angular momentum . . and . . kinetic energy of d disk . . . .

*September 22, 2016 by samson*

**physics**

A turntable with a moment of inertia of 0.014 kg*m2 rotates feely at 2.7 rad/s. A circular disk of mass 500 g and diameter 22 cm, and initially not rotating, slips down a spindle and lands on the turntable. a) Find the new angular speed. rad/s b) what is the change in kinetic...

*December 11, 2010 by applebottom*

**Physics**

A disk with a mass of 18 kg, a diameter of 50 cm, and a thickness of 8 cm is mounted on a rough horizontal axle as shown on the left in the figure. (There is a friction force between the axle and the disk.) The disk is initially at rest. A constant force, F = 70 N,is applied ...

*October 24, 2010 by Donny*

**Physics**

Two disks are originally separated. The mass of Disk #1 is 1.5 kg, and the mass of disk #2 is 2.6 kg. Disk #1 has a radius of 10 cm, and it is rotating at an angular velocity of 15.0 rad/sec. Disk #2 has a radius of 15 cm, and it rotates in the opposite direction at an angular...

*April 6, 2015 by jeff*

**physics**

A force of 100 N is applied tangentially to a disk of radius 10 cm and mass 0.5 kg. the disk is initially at rest. What is the angular acceleration of the disk? How many revolutions does the disk goes through after 10 sec. How much rotational work was done on the disk?

*December 4, 2010 by Maa*

**physics**

a disk i = 0.7 kgm and radius 60 cm is rotating a 12 rpm. there is an external torque applied to the outer edge and the rotational speed increases to 35 rpm in 8 sec. angular acceleration? angle the disk rotates? magnitude of applied force (assume tangential)?

*January 14, 2016 by kathy*

**momentum**

A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. The disk has a mass of 230 kg and a radius of 1.6 m. A 38- kg child rides at the center of the merry-go-round while a playmate sets it turning at 0.15rpm. If the...

*November 20, 2009 by Rachel*

**Physics**

The 1.4 kg, 40-cm-diameter disk in the figure below is spinning at 260 rpm. How much friction force must the brake apply to the rim to bring the disk to a halt in 4.5 s?

*November 18, 2010 by sara*

**Angular Velocity Question**

A disk with a mass of 18 kg, a diameter of 50 cm, and a thickness of 8 cm is mounted on a rough horizontal axle as shown on the left in the figure. (There is a friction force between the axle and the disk.) The disk is initially at rest. A constant force, F = 70 N,is applied ...

*October 25, 2010 by Oscar*

**math**

a circular opaque disk, 25 cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. Ascreen is placed 30 cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen. Ok, I have drawn a sketch and can say that the ...

*August 27, 2012 by SABRINA*

**Physics**

A high-speed sander has a disk 5.70 cm in radius that rotates about its axis at a constant rate of 1120 revolutions per minute. a.) Determine the angular speed of the disk in radians per second. b.) Determine the linear speed of a point 2.40 cm from the disk's center. c.) ...

*March 30, 2016 by Emily*

**math**

Mr. Fleep had a new flying disk design. He made some calculations and decided if he could make a flying disk that had a perimeter exactly 4 times the diameter that it would be more aerodynamically stable than a "standard" flying disk and thus fly further. Is this design ...

*March 13, 2012 by HELP HELP HELP*

**physics**

starting from rest, a disk rotates about its central axis with constant angular acceleration. In 4 seconds, it has rotated 50 rad. What was the angualr acceleration during this time? What is the instantaneous angular velocity of the disk at the end of the 4 seconds?

*January 27, 2008 by Kristen*

**Physics**

The 3.1 , 38-cm-diameter disk in the figure is spinning at 310 . How much friction force must the brake apply to the rim to bring the disk to a halt in 2.6 ? Express your answer using two significant figures.

*November 13, 2012 by Amy*

**physics**

A compact disk, which has a diameter of 12.0 cm, speeds up uniformly from zero to 4.40 rev/s in 3.20 s. What is the tangential acceleration of a point on the outer rim of the disk at the moment when its angular speed is 2.00(rev/s)?

*October 17, 2009 by angel*

**college physics **

A compact disk, which has a diameter of 12.0 cm, speeds up uniformly from zero to 4.40 rev/s in 3.20 s What is the tangential acceleration of a point on the outer rim of the disk at the moment when its angular speed is 3.00 {rev/s}?

*October 18, 2009 by carman*

**physcis**

Disk 1 (of inertia m) slides with speed 2.0 m/s across a low-friction surface and collides with disk 2 (of inertia 2m) originally at rest. Disk 1 is observed to turn from its original line of motion by an angle of 15 ∘, while disk 2 moves away from the impact at an angle...

*November 17, 2015 by yan*

**phsyics**

A compact disk, which has a diameter of 12.0 cm, speeds up uniformly from zero to 2.50 rev/s in 2.10 s. What is the tangential acceleration of a point on the outer rim of the disk at the moment when its angular speed is the following values? (a) 2.00 rev/s

*October 24, 2010 by mary*

**Physics**

A solid cylindrical disk has a radius of 0.18 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. When a 40-N force is applied tangentially to the disk, perpendicular to the radius, the disk acquires an angular acceleration of 90 ...

*November 22, 2011 by Kelsey*

**Physics helppp**

The figure below shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 80 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 45.0 N, T2 = 37.3 N...

*July 13, 2010 by Sam*

**physics**

A solid cylindrical disk has a radius of 0.17 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. When a 35-N force is applied tangentially to the disk, perpendicular to the radius, the disk acquires an angular acceleration of 100 ...

*November 30, 2010 by mackenzie m*

**physics **

The average car today has a mass of 1100 kg, and when accelerating from rest, covers 0.25 miles in 15 seconds. Each rim and tire together has a diameter of 46 cm and a mass of 9.1kg. If we agree the rim and tire have the shape of a solid disk that rotates through its geometric...

*November 3, 2014 by Anonymous*

**physics **

The average car today has a mass of 1100 kg, and when accelerating from rest, covers 0.25 miles in 15 seconds. Each rim and tire together has a diameter of 46 cm and a mass of 9.1kg. If we agree the rim and tire have the shape of a solid disk that rotates through its ...

*November 4, 2014 by help please*

**physics angular velocity**

A 20g steel weight is placed on the edge of 1 30cm diameter plastic disk. The coefficient of static friction between the steel weight and plastic disk is 0.4. At what angular velocity will the weight slide off the disk?

*March 25, 2013 by Kristy*

**rolling motion **

The average car today has a mass of 1100 kg, and when accelerating from rest, covers 0.25 miles in 15 seconds. Each rim and tire together has a diameter of 46 cm and a mass of 9.1kg. If we agree the rim and tire have the shape of a solid disk that rotates through its geometric...

*November 3, 2014 by Anonymous*

**physics **

The average car today has a mass of 1100 kg, and when accelerating from rest, covers 0.25 miles in 15 seconds. Each rim and tire together has a diameter of 46 cm and a mass of 9.1kg. If we agree the rim and tire have the shape of a solid disk that rotates through its geometric...

*November 3, 2014 by help*

**Physics**

Suppose you’re eating in a restaurant where the dishes are shared at the table and all placed uniformly on a rotating disk-like surface. Model this surface as a thin disk of radius 33.4 cm. You can’t stop thinking about physics even though you’re out with your friends, ...

*April 22, 2016 by Santhiya *

**physics**

A disk with mass m = 8.1 kg and radius R = 0.33 m begins at rest and accelerates uniformly for t = 18 s, to a final angular speed of ω = 34 rad/s. What is the angular acceleration of the disk? What is the angular displacement over the 18 s? What is the moment of inertia ...

*November 3, 2014 by stewart*

**Physics**

Disk 1(of mass m) slides with speed 1.0 m/s across a low friction surface and collides with disk 2( of mass 2m) originally at rest. Disk 1 is observed to bounce off at an angle of 15degrees to its original line of motion, while disk 2 moves at an angle of 55degrees. a) What is...

*November 20, 2014 by Dane*

**physics**

The figure shows an overhead view of a uniform 2.00-kg plastic rod of length 1.20 m on a very slick table. One end of the rod is attached to the table, and the rod is free to pivot about this point without friction. A disk of mass 36.0 g slides without friction toward the ...

*December 2, 2012 by HALP!!!*

**physics**

an arrangement of four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 81.2 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 62.7 N, T2 = 33.6 N, and T3 = 8.5 N. What are ...

*February 8, 2015 by Anonymous*

**physics**

A solid cylindrical disk has a radius of 0.16 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. When a 50 N force is applied tangentially to the disk, perpendicular to the radius, the disk acquires an angular acceleration of 120 ...

*June 1, 2007 by meredith*

**physics**

(a) What is the tangential acceleration of a bug on the rim of a 6.0 in. diameter disk if the disk moves from rest to an angular speed of 79 rev/min in 5.0 s? m/s2 (b) When the disk is at its final speed, what is the tangential velocity of the bug? m/s (c) One second after the...

*March 27, 2010 by Kelsey*

**physics help 4 please!**

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 speed of the disk be? ? rad/s b.) What is the rotational KE of the disk? ? J c.) What is the total KE of the disk? ? J d.) The disk then rolls up a hill...

*October 18, 2008 by kelsey*

**physics**

The figure shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 82.6 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 61.4 N, T2 = 47.2 N, and...

*October 3, 2013 by kristy*

**Physics**

The figure shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 93.4 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 61.4 N, T2 = 41.5 N, and...

*February 23, 2016 by Nick*

**machines**

how do disc grinders work? My disk grinder has a series AC motor attached to a rubber disk upon which the grinding sheet is attached. The grinding sheet I use is carbide glued to paper. The carbide coated sheet rotates against the metal, usually a weld I am smoothing, and the ...

*September 3, 2005 by juli*

**Physics**

A uniform disk with mass m = 8.54 kg and radius R = 1.35 m lies in the x-y plane and centered at the origin. Three forces act in the +y-direction on the disk: 1) a force 333 N at the edge of the disk on the +x-axis, 2) a force 333 N at the edge of the disk on the –y-axis, ...

*November 10, 2014 by stewart*

**physics help**

A disk is rotating at 50rps (revolution per second) about its fixed axis (delta) with respect to which its moment of inertia is J= 2×10^-2 kg.m^2 A braking couple of moment -0.5N.m is applied to the disk (the sense of rotation of the disk is taken as positive ). The disk will...

*February 4, 2016 by angy*

**physics**

A disk is rotating at 50rps (revolution per second) about its fixed axis (delta) with respect to which its moment of inertia is J= 2×10^-2 kg.m^2 A braking couple of moment -0.5N.m is applied to the disk (the sense of rotation of the disk is taken as positive ). The disk ...

*February 4, 2016 by angy*