Two spinning disks have equal masses and the same angular momentum. If disk 1 has half...
Two spinning disks have equal masses and the same angular momentum. If disk 1 has half the radius as disk 2, how does the angular speed of disk 1 compare with that of disk 2? It is twice as much. It is four times as much It is half as much It is 1/4 has much
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Two spinning disks have equal masses and the same angular
momentum. If disk 1 has half...
1). A metal disk with radius, r, is spinning with a constant angular velocity. A red...
1). A metal disk with radius, r, is spinning with a constant
angular velocity. A red magnet is placed on the disk
at
and a blue magnet is placed at r. If you compare the
tangential speed of the two magnets,
a. the red magnet is going half as fast
b. the magnets are going the same speed
c. the blue magnet is going twice as fast
d. the blue magnet is going four times as fast
2). In the...
3. Multiple Choice - select the best answer. Two disks each have the same mass, but...
3. Multiple Choice - select the best answer. Two disks each have the same mass, but one disk's radius is twice as large as the others. Which disk has the larger moment of inertia about its center? (Note that the masses of the disks are equal, not their densities.) a. The smaller disk, by a factor of two smaller disk, by a factor of four. The targer disk, by a factor of two d. The larger disk, by a factor...
Figure 12 shows two disks A & B rotating in the same direction. Disk A has...
Figure 12 shows two disks A & B rotating in the same direction. Disk A has a mass of 2.00 kg, a radius of 0.200 m, and an initial angular speed of 50.0 rad/s. Disk B has a mass of 4.00 kg, a radius of 0.100 m, and an initial angular speed of 200 rad/s. The disks are pushed toward each other with equal and opposite forces acting along the common axis. Find the common angular speed after the disks...
3 pts each la) A solid disk and a hoop have the same mass and radius....
3 pts each la) A solid disk and a hoop have the same mass and radius. If they have the same angular momentum, the angular speed of the disk is than the angular speed of the hoop. a) four times larger b) two times larger c) two times smaller d) four times smaller 1b) An object undergoing simple harmonic motion has a maximum potential energy of 12 J when it reaches its maximum displacement x = A. What the object's...
Sample Question Example – Disk dropped on Disk top initial - 0. 1) If both disks...
Sample Question Example – Disk dropped on Disk top initial - 0. 1) If both disks have the same moment of inertia (1), what is the angular momentum of the top disk before the collision? What is the angular momentum of the bottom disk before the collision? O top, final = 0 bottom, final = 0, 2) What is the angular momentum of the top disk after the collision? Bottom disk? bottom initial = 0 3) What type of collision...
Two disks of identical mass but dif- ferent radii (r and 21) are spinning on frictionless bearings at the same angular...
Two disks of identical mass but dif- ferent radii (r and 21) are spinning on frictionless bearings at the same angular speed w, but in opposite directions (Fig- ure 10-46). The two disks are brought slowly together. The re- sulting frictional force between the surfaces eventually brings them to a common angular velocity. What is the magnitude of that final angular velocity in terms of w.? 00 00
Two disks are rotating about the same axis. Disk A has a moment of inertia of...
Two disks are rotating about the same axis. Disk A has a moment of inertia of 4.45 kg.m2 and an angular velocity of +4.87 rad/s. Disk B is rotating with an angular velocity of -7.28 rad/s. The two disks are then linked together without the orques, so that they rotate as a single unit with an angular velocity of -3.59 rad/s. The axis of rotation for this unit is the same as that for the separate disks. What is the...
Two disks are rotating about the same axis. Disk A has a moment of inertia of...
Two disks are rotating about the same axis. Disk A has a moment of inertia of 9.20 kg·m2 and an angular velocity of +9.96 rad/s. Disk B is rotating with an angular velocity of -8.43 rad/s. The two disks are then linked together without the aid of any external torques, so that they rotate as a single unit with an angular velocity of -3.59 rad/s. The axis of rotation for this unit is the same as that for the separate...
Two disks are rotating about the same axis. Disk A has a moment of inertia of...
Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.3 kg · m2 and an angular velocity of +7.4 rad/s. Disk B is rotating with an angular velocity of -9.3 rad/s. The two disks are then linked together without the aid of any external torques, so that they rotate as a single unit with an angular velocity of -2.5 rad/s. The axis of rotation for this unit is the same as that for...
Two disks are rotating about the same axis. Disk A has a moment of inertia of...
Two disks are rotating about the same axis. Disk A has a moment of inertia of 4.50 kg·m2 and an angular velocity of +1.17 rad/s. Disk B is rotating with an angular velocity of -6.93 rad/s. The two disks are then linked together without the aid of any external torques, so that they rotate as a single unit with an angular velocity of -3.80 rad/s. The axis of rotation for this unit is the same as that for the separate...
1). A metal disk with radius, r, is spinning with a constant
angular velocity. A red magnet is placed on the disk
at
and a blue magnet is placed at r. If you compare the
tangential speed of the two magnets,
a. the red magnet is going half as fast
b. the magnets are going the same speed
c. the blue magnet is going twice as fast
d. the blue magnet is going four times as fast
2). In the...
3. Multiple Choice - select the best answer. Two disks each have the same mass, but one disk's radius is twice as large as the others. Which disk has the larger moment of inertia about its center? (Note that the masses of the disks are equal, not their densities.) a. The smaller disk, by a factor of two smaller disk, by a factor of four. The targer disk, by a factor of two d. The larger disk, by a factor...
Figure 12 shows two disks A & B rotating in the same direction. Disk A has a mass of 2.00 kg, a radius of 0.200 m, and an initial angular speed of 50.0 rad/s. Disk B has a mass of 4.00 kg, a radius of 0.100 m, and an initial angular speed of 200 rad/s. The disks are pushed toward each other with equal and opposite forces acting along the common axis. Find the common angular speed after the disks...
3 pts each la) A solid disk and a hoop have the same mass and radius. If they have the same angular momentum, the angular speed of the disk is than the angular speed of the hoop. a) four times larger b) two times larger c) two times smaller d) four times smaller 1b) An object undergoing simple harmonic motion has a maximum potential energy of 12 J when it reaches its maximum displacement x = A. What the object's...
Sample Question Example – Disk dropped on Disk top initial - 0. 1) If both disks have the same moment of inertia (1), what is the angular momentum of the top disk before the collision? What is the angular momentum of the bottom disk before the collision? O top, final = 0 bottom, final = 0, 2) What is the angular momentum of the top disk after the collision? Bottom disk? bottom initial = 0 3) What type of collision...
Two disks of identical mass but dif- ferent radii (r and 21) are spinning on frictionless bearings at the same angular speed w, but in opposite directions (Fig- ure 10-46). The two disks are brought slowly together. The re- sulting frictional force between the surfaces eventually brings them to a common angular velocity. What is the magnitude of that final angular velocity in terms of w.? 00 00
Two disks are rotating about the same axis. Disk A has a moment of inertia of 4.45 kg.m2 and an angular velocity of +4.87 rad/s. Disk B is rotating with an angular velocity of -7.28 rad/s. The two disks are then linked together without the orques, so that they rotate as a single unit with an angular velocity of -3.59 rad/s. The axis of rotation for this unit is the same as that for the separate disks. What is the...
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