a) In what direction does the turntable rotate? counterclockwise clockwise With what angular speed does the turntable rotate? ________rad/s (b) How much work does the woman do to set herself and the turntable into motion? __________J

a) In what direction does the turntable rotate? counterclockwise clockwise With what angular speed does the turntable rotate? rad/s (b) How much work does the woman do to set herself and the turntable into motion? __J

Similar questions

An electric motor rotating a workshop grinding wheel at 1.14 102 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.98 rad/s2. (a) How long does it take the grinding wheel to stop? (b) Through how many radians has the wheel turned during the time interval found in part (a)?
A cockroach of mass m lies on the rim of a uniform disk of mass 8.00m that can rotate freely about its center like a merry-go-round. Initially the cockroach and disk rotate together with an angular velocity of 0.320 rad/s. Then the cockroach walks halfway to the center of the disk. (a) What then iş the angular velocity of the cockroach-disk system? rad/s (b) What is the ratio K/Ko of the new kinetic energy of the system to its initial kinetic energy? (c) What accounts for the change in the kinetic energy? (Select all that apply.) O cockroach does negative work on the disk O gravity O centripetal force O friction O centrifugal force O cockroach does positive work on the disk
A skater goes for a jump with turns. When she extends her arms, her moment of inertia about an axis through his body is 1.750 kg*m2. She initially pins at 0.650 rev/s and launches herself into the air and remained there for about 1.570 seconds while spinning at a constant angular speed. Assuming that her moment of inertia about an axis through his body has a value of 0.62 kg*m2, determine how many revolutions can she execute.
Conceptual Example 14 provides useful background for this problem. A playground carousel is free to rotate about its center on frictionless bearings, and air resistance is negligible. The carousel itself (without riders) has a moment of inertia of 110 kg-m2. When one person is standing at a distance of 1.71 m from the center, the carousel has an angular velocity of 0.644 rad/s. However, as this person moves inward to a point located 0.641 m from the center, the angular velocity increases to 0.832 rad/s. What is the person's mass? | | Number i Units
A 55.0-kg woman stands at the rim of a horizontal turntable having a moment of inertia of 560 kg · m? and a radius of 2.00 m. The turntable is initially at rest and is free to rotate about a frictionless vertical axle through its center. The woman then starts walking around the rim clockwise (as viewed from above the system) at a constant speed of 1.50 m/s relative to the Earth. (a) In what direction does the turntable rotate? O clockwise O counterclockwise with what angular speed does the turntable rotate? rad/s (b) How much work does the woman do to set herself and the turntable into motion?
The ability of the human eye to rapidly rotate was studied using contact lenses fitted with accelerometers. While a subject, whose eyeball has radius 1.25 cm, watches a moving object her eyeball rotates through 20.0° in a time interval of 64.1ms. Assume that the eye starts at rest, rotates with a constant angular acceleration during the first half of the interval, and then the rotation slows with a constant angular acceleration during the second half until it comes to rest. What is the magnitude of the angular acceleration of the eye? rad/s2
Conceptual Example 14 provides useful background for this problem. A playground carousel is free to rotate about its center on frictionless bearings, and air resistance is negligible. The carousel itself (without riders) has a moment of inertia of 125 kg-m². When one person is standing on the carousel at a distance of 1.50 m from the center, the carousel has an angular velocity of 0.600 rad/s. However, as this person moves inward to a point located 0.917 m from the center, the angular velocity increases to 0.800 rad/s. What is the porcon's marr?
A flat uniform circular disk (radius = 6.22 m, mass=320 kg) is initially stationary. The disk is free to rotate in the horizontal plane about a frictionless axis perpendicular to the center of the disk. A 51.0-kg person, standing 2.32 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 3.00 m/s relative to the ground. Find the resulting angular speed (in rad/s) of the disk.
A student sits on a rotating stool holding two 3.20-kg objects. When his arms are extended horizontally, the objects are 1.00 m from the axis of rotation and he rotates with an angular speed of 0.750 rad/s. The moment of inertia of the student plus stool is 3.00 kg • m and is assumed to be constant. The student then pulls in the objects horizontally to 0.490 m from the rotation axis. (a) Find the new angular speed of the student. rad/s (b) Find the kinetic energy of the system (student/stool/objects) before and after the objects are pulled in. before J after
A cockroach of mass m lies on the rim of a uniform disk of mass 3.00 m that can rotate freely about its center like a merry-go-round. Initially the cockroach and disk rotate together with an angular velocity of 0.434 rad/s. Then the cockroach walks halfway to the center of the disk.(a) What then is the angular velocity of the cockroach-disk system?(b) What is the ratio K/K0 of the new kinetic energy of the system to its initial kinetic energy?
A 56.0-kg woman stands at the western rim of a horizontal turntable having a moment of inertia of 485 kg · m2 and a radius of 2.00 m. The turntable is initially at rest and is free to rotate about a frictionless, vertical axle through its center. The woman then starts walking around the rim counterclockwise (as viewed from above the system) at a constant speed of 1.50 m/s relative to the Earth. Consider the woman–turntable system as motion begins.
Conceptual Example 14 provides useful background for this problem. A playground carousel is free to rotate about its center on frictionless bearings, and air resistance is negligible. The carousel itself (without riders) has a moment of inertia of 125 kg-m². When one person is standing on the carousel at a distance of 1.50 m from the center, the carousel has an angular velocity of 0.600 rad/s. However, as this person moves inward to a point located 1.01 m from the center, the angular velocity increases to 0.800 rad/s. What is the person's mass? m = i