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A 85 kg person, which tan be treated at a point maw. 11 initially located at...
A child pushes her friend (m = 25 kg) located at a radius r = 1.5...
A child pushes her friend (m = 25 kg) located at a radius r = 1.5 m on a merry-go-round (rmgr = 2.0 m, Imgr = 1000 kg*m2) with a constant force F = 90 N applied tangentially to the edge of the merry-go-round (i.e., the force is perpendicular to the radius). The merry-go-round resists spinning with a frictional force of f = 10 N acting at a radius of 1 m and a frictional torque τ = 15 N*m...
6. (25 points) The following question examines the motion of two children on a merry-go- round. You may treat the child...
6. (25 points) The following question examines the motion of two children on a merry-go- round. You may treat the children as point particles with mass m and the merry-go-round as a disk with mass M and radius R. The moment of inertia of a disk is Idisk MR2 0wn o r Ve n e r (a) Calculate the total energy of the system if the two children are at the edge of the merry- go-round and the merry-go-round is...
A person sits on a frictionless stool that is free to rotate but is initially at...
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 70 kg merry-go-round disk has a radius of 3 meters and spins at 1.4 radians/sec...
A 70 kg merry-go-round disk has a radius of 3 meters and spins at 1.4 radians/sec with the 80 kg person on the edge. If the person moves so that they are now only 1 meter from the center, calculate the new angular speed of the merry-go-round system. Calculate the total kinetic energy of the system when the person is at the edge and when the person is at the 1 meter spot.
A merry-go-round is rotating at an angular speed of 0.2 radians/s. Its motor falls off and...
A merry-go-round is rotating at an angular speed of 0.2 radians/s. Its motor falls off and it rotates freely. A technician jumps on the edge along the direction of the radius. The angular velocity after he lands is 0.04 radians/s. The moment of inertia of the technician, in (kg m2) with respect to the axis of the merry-go-round’s axis of rotation is 5000 kg m2 . What is the moment of inertia of the merry-go-round?
A person of mass 77 kg stands at the center of a rotating merry-go-round platform of...
A person of mass 77 kg stands at the center of a rotating merry-go-round platform of radius 2.8 mand moment of inertia 840 kg⋅m2 . The platform rotates without friction with angular velocity 0.95 rad/s . The person walks radially to the edge of the platform. Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk.
A person of mass 70 kg stands at the center of a rotating merry-go-round platform of...
A person of mass 70 kg stands at the center of a rotating merry-go-round platform of radius 3.4 m and moment of inertia 940 kg⋅m2 . The platform rotates without friction with angular velocity 1.6 rad/s . The person walks radially to the edge of the platform. Calculate the angular velocity when the person reaches the edge. In rad/sec Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk. In J.
A person of mass 70-kg stands at the center of a rotating merry - go- round...
A person of mass 70-kg stands at the center of a rotating merry - go- round platform of radius 3.1 meter and the moment of inertia 900kg*m^2. The platform rotates without friction with angular velocity 0.85 rad/s. The person walk radially to the edge of the platform. Part A Calculate the angular velocity when the person reaches the edge. Express your answer using three significant figures and include the appropriate units. Part B Calculate the rotational kinetic energy of the...
A person of mass 80 kg stands at the center of a rotating merry go round...
A person of mass 80 kg stands at the center of a rotating merry go round platform of radius 2.8m and moment of inertia 870kg ×m^2. the platform rotates without friction with angular velocity .95 rad/s. the person walks radially to the edge of the platform. calculate the rotational kinetic energy of the system of platform plus person before and after the persons walk
A boy of mass 35.2 kg is standing on the edge of a merry-go-round which is at rest.
A boy of mass 35.2 kg is standing on the edge of a merry-go-round which is at rest. The merry-go-round is a flat disk of mass 59.3 kg and radius 2.3m (the moment of inertia of a cylinder is ½ mr^2 ), turning on a frictionless pivot. The boy starts to walk around the edge of the merry-go-round in the clock-wise direction (when viewed from the top). When the boy is moving at 2.4 m/s relative to the merry-go-round: a....
6. (25 points) The following question examines the motion of two children on a merry-go- round. You may treat the children as point particles with mass m and the merry-go-round as a disk with mass M and radius R. The moment of inertia of a disk is Idisk MR2 0wn o r Ve n e r (a) Calculate the total energy of the system if the two children are at the edge of the merry- go-round and the merry-go-round is...
A 70 kg merry-go-round disk has a radius of 3 meters and spins at 1.4 radians/sec with the 80 kg person on the edge. If the person moves so that they are now only 1 meter from the center, calculate the new angular speed of the merry-go-round system. Calculate the total kinetic energy of the system when the person is at the edge and when the person is at the 1 meter spot.
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