The initial angular momentum is equal to final angular momentum so that angular momentum is conserved.
b)
The change in rotation kinetic energy is
Please explain the process. A 70 kg Person sitting on a frictionless stool Is hulking to...
A person sits on a frictionless stool that is free to rotate but is initially at rest. The person is holding a bicycle wheel (I = 3 kg*m2) that is rotating at 8 rev/s in the clockwise direction as viewed from above, and the moment of inertia of the person-wheel-stool system is 9 kg*m2. For this problem, all answers involving a rotational component will be expressed in revolutions rather than radians. 1. What is direction of the angular momentum of...
A person, sitting on a stool rotating at a rate of 21 rpm, holds masses in each hand. When their arms are outstretched , the total rotational inertia of the system is 3.7 kg∙m2. The person pulls their arms close to their body, reducing the total rotational inertia to 1.7 kg∙m2. If there are no external torques, what is the new angular velocity of the system in rad/s?
A student sits on a freely rotating stool holding two weights, each of mass 4 kg.. When his arms are extended horizontally, the weights are 1.1 m from the axis of rotation and he rotates with an angular speed of 0.9 rad/s. The moment of inertia of the student plus stool is 3.0 kg-m2 and is assumed to be constant. The student pulls the weights inward horizontally to a position 0.4 m from the rotation axis. Find the new angular...
A student sits on a freely rotating stool holding two weights, each of mass 3.08 kg. When his arms are extended horizontally, the weights are 0.91 m from the axis of rotation and he rotates with an angular speed of 0.755 rad/s. The moment of inertia of the student plus stool is 3.08 kg·m2 and is assumed to be constant. The student pulls the weights inward horizontally to a position 0.294 m from the rotation axis. (a) Find the new...
A student sitting on a stool that is free to rotate (frictionless), but is initially at rest, holds a bicycle wheel. The wheel has a rotational velocity of 10 rev/s about a vertical axis counter clockwise (vector of angular momentum points up). The rotational inertia of the wheel is 4 kg*m2 about its center and the rotational inertia of the student and wheel and platform about the rotational axis of the platform is 12 kg*m2. If the student flips the axis of...
A student sits on a freely rotating stool holding two dumbbells, each of mass 2.93 kg (see figure below). When his arms are extended horizontally (Figure a), the dumbbells are 0.97 m from the axis of rotation and the student rotates with an angular speed of rad/s. The moment of inertia of the student plus stool is 2.75 kg m^2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.291 m from the...
3) (Student Spinning on Stool) A student sits spinning on a stool at initial angular velocity angular velocity w, = 4.00 Hz, initially with arms rigidly outstretched, holding two identical m= 2.00 kg weights (one in left hand and one in the right hand) at distance r = 0.600m from the student's axis of rotation. The student's moment of inertia (without including the contribution of the two weights) is I = 4.00 kg m². Assume that the contribution of the...
A student sits on a freely rotating stool holding two dumbbells, each of mass 2.98 kg . When his arms are extended horizontally , the dumbbells are 0.96 m from the axis of rotation and the student rotates with an angular speed of 0.747 rad/s. The moment of inertia of the student plus stool is 2.62 kg · m2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.305 m from the rotation...
A student sits on a freely rotating stool holding two dumbbells, each of mass 2.99 kg (see figure below). When his arms are extended horizontally (Figure a), the dumbbells are 1.09 m from the axis of rotation and the student rotates with an angular speed of 0.752 rad/s. The moment of inertia of the student plus stool is 2.80 kg . m and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.293 m...
A student sits on a freely rotating stool holding two dumbbells,
each of mass 3.08 kg (see figure below). When his arms are extended
horizontally (Figure a), the dumbbells are 0.96 m from the axis of
rotation and the student rotates with an angular speed of 0.755
rad/s. The moment of inertia of the student plus stool is 2.53 kg ·
m2 and is assumed to be constant. The student pulls the
dumbbells inward horizontally to a position 0.304 m...