Homework Answers
A uniform disk with mass M and radius R is rotating about an axis through its center-of-mass.
A uniform disk with mass M and radius R is rotating about an axis through its center-of-mass. The axis is perpendicular to the disk. The moment of inertial for the disk with a central axis is I MR2. Two non-rotating smaller disks, each with mass M2 and radius R/4, are glued on the original disk as shown in the figure. (a) Show that the ratio of the moments of inertia is given by I'/I = 35/16, where I' is the moment...
5. The figures on the right show a disk with radius, a = 0.20 m, and mass, M = 0.80 kg, resting on a frictionless table. One particle with mass, m1-M/4, with velocity, v- 4 m/s, slides along the stab...
5. The figures on the right show a disk with radius, a = 0.20 m, and mass, M = 0.80 kg, resting on a frictionless table. One particle with mass, m1-M/4, with velocity, v- 4 m/s, slides along the stable, and collides with the disk at the point shown. A second particle with mass, m2, moving with velocity v2-4v collides with the disk at the point shown. The two masses collide with the disk at the same time, and after...
a. The figures show a disk with radius, a= 0.20 m, and mass, M= 0.80 kg,...
a. The figures show a disk with radius, a= 0.20 m, and mass, M=
0.80 kg, resting on a frictionless table. One particle with mass,
m1 = M/4, with velocity, v= 4 m/s, slides along the
stable, and collides with the disk at the point shown. A second
particle with mass, m2, moving with velocity
v2 = 4v collides with the disk at the point shown. The
two masses collide with the disk at the same time, and after the...
A uniform solid disk of mass m = 3.08 kg and radius r = 0.200 m...
A uniform solid disk of mass m = 3.08 kg and radius r = 0.200 m rotates about a fixed axis perpendicular to its face with angular frequency 6.09 rad/s. (a) Calculate the magnitude of the angular momentum of the disk when the axis of rotation passes through its center of mass. kg · m2/s (b) What is the magnitude of the angular momentum when the axis of rotation passes through a point midway between the center and the rim?...
A uniform solid disk of mass m = 3.06 kg and radius r = 0.200 m...
A uniform solid disk of mass m = 3.06 kg and radius r = 0.200 m rotates about a fixed axis perpendicular to its face with angular frequency 6.09 rad/s. (a) Calculate the magnitude of the angular momentum of the disk when the axis of rotation passes through its center of mass. kg · m2/s (b) What is the magnitude of the angular momentum when the axis of rotation passes through a point midway between the center and the rim?...
A puck of mass m1 = .09 kg and radius r1 .03m glides across an air table...
A puck of mass m1 = .09 kg and radius r1 .03m glides across an air table at a speed of v1= 1.50 m/s. It makes a glancing collision with a second puck of radius r2= .07m and mass m2 = .1kg with a speed of v2 = -.5 such that their rims just touch. Because their rims are coated with instant-acting glue, the pucks stick together and rotate after the collision. Find the center of mass and moment of inertia...
A ladybug crawls along the radius of a rotating compact disk of mass M = 0.015...
A ladybug crawls along the radius of a rotating compact disk of mass M = 0.015 kg and radius r = 0.06 m (ldisk = Mr²/2). The pivot is frictionless and the disk is initially rotating with angular speed wa = 31.416 rad/s. The ladybug starts at the outer edge (Figure A) and ends at center (Figure B). At the end of the ladybug's travel the disk rotates with angular speed wg = 31.510 rad/s. WB Figure A Figure B...
A solid disk of mass m = 9.2 kg and radius R = 0.2 m is...
A solid disk of mass m = 9.2 kg and radius R = 0.2 m is rotating with a constant angular velocity of w = 38 rad/s. A thin rectangular rod with mass m2 = 3.7 kg and length L = 2R = 0.4 m begins at rest above the disk and is dropped on the disk where it begins to spin with the disk. 1) What is the initial angular momentum of the rod and disk system? kg-m2/s Submit...
Constants Two metal disks, one with radius Ri = 2.44 cm and mass M = 0.820...
Constants Two metal disks, one with radius Ri = 2.44 cm and mass M = 0.820 kg and the other with radius R2 = 5.07 cm and mass M2 = 1.66 kg, are welded together and mounted on a frictionless axis through their common center. (Figure 1). Part A What is the total moment of inertia of the two disks? I = 2.38 10-3 kg. m² Submit Previous Answers Correct Part B A light string is wrapped around the edge...
Disk A, with a mass of 2.0 kg and a radius of 90 cm, rotates clockwise...
Disk A, with a mass of 2.0 kg and a radius of 90 cm, rotates clockwise about a frictionless vertical axle at 50 rev/s. Disk B, also 2.0 kg but with a radius of 80 cm , rotates counterclockwise about that same axle, but at a greater height than disk A, at 50 rev/s. Disk B slides down the axle until it lands on top of disk A, after which they rotate together. After the collision, what is magnitude of...
5. The figures on the right show a disk with radius, a = 0.20 m, and mass, M = 0.80 kg, resting on a frictionless table. One particle with mass, m1-M/4, with velocity, v- 4 m/s, slides along the stable, and collides with the disk at the point shown. A second particle with mass, m2, moving with velocity v2-4v collides with the disk at the point shown. The two masses collide with the disk at the same time, and after...
a. The figures show a disk with radius, a= 0.20 m, and mass, M=
0.80 kg, resting on a frictionless table. One particle with mass,
m1 = M/4, with velocity, v= 4 m/s, slides along the
stable, and collides with the disk at the point shown. A second
particle with mass, m2, moving with velocity
v2 = 4v collides with the disk at the point shown. The
two masses collide with the disk at the same time, and after the...
A uniform solid disk of mass m = 3.06 kg and radius r = 0.200 m rotates about a fixed axis perpendicular to its face with angular frequency 6.09 rad/s. (a) Calculate the magnitude of the angular momentum of the disk when the axis of rotation passes through its center of mass. kg · m2/s (b) What is the magnitude of the angular momentum when the axis of rotation passes through a point midway between the center and the rim?...
A ladybug crawls along the radius of a rotating compact disk of mass M = 0.015 kg and radius r = 0.06 m (ldisk = Mr²/2). The pivot is frictionless and the disk is initially rotating with angular speed wa = 31.416 rad/s. The ladybug starts at the outer edge (Figure A) and ends at center (Figure B). At the end of the ladybug's travel the disk rotates with angular speed wg = 31.510 rad/s. WB Figure A Figure B...
A solid disk of mass m = 9.2 kg and radius R = 0.2 m is rotating with a constant angular velocity of w = 38 rad/s. A thin rectangular rod with mass m2 = 3.7 kg and length L = 2R = 0.4 m begins at rest above the disk and is dropped on the disk where it begins to spin with the disk. 1) What is the initial angular momentum of the rod and disk system? kg-m2/s Submit...
Constants Two metal disks, one with radius Ri = 2.44 cm and mass M = 0.820 kg and the other with radius R2 = 5.07 cm and mass M2 = 1.66 kg, are welded together and mounted on a frictionless axis through their common center. (Figure 1). Part A What is the total moment of inertia of the two disks? I = 2.38 10-3 kg. m² Submit Previous Answers Correct Part B A light string is wrapped around the edge...
Disk A, with a mass of 2.0 kg and a radius of 90 cm, rotates clockwise about a frictionless vertical axle at 50 rev/s. Disk B, also 2.0 kg but with a radius of 80 cm , rotates counterclockwise about that same axle, but at a greater height than disk A, at 50 rev/s. Disk B slides down the axle until it lands on top of disk A, after which they rotate together. After the collision, what is magnitude of...
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