The wheels of a wagon can be approximated as the combination of a thin outer hoop of radius rh = 0.156 m and mass 5.65 kg, and two thin crossed rods of mass 8.23 kg each. Imagine replacing the wagon wheels with uniform disks that are ta = 4.62 cm thick, made out of a material with a density of 8290 kg/m³. If the new wheel is to have the same moment of inertia about its center as the old wheel about its center, what should the radius of the disk be? O ta H rd = 0.2043 Incorrect m
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- A bicycle tire has a mass of 2.74 kg and a radius of 0.342 m. (a) Treating the tire as a hoop, what is its moment of inertia about an axis passing through the hub at its center? kg · m2 (b) What torque is required to produce an angular acceleration of 0.702 rad/s2? N. m (c) What friction force applied tangentially to the edge of the tire will create a torque of that magnitude? N Need Help? Read It s documThe wheels of a wagon can be approximated as the combination of a thin outer hoop, of radius ?h=0.156 m and mass 5.08 kg , and two thin crossed rods of mass 7.37 kg each. A farmer would like to replace his wheels with uniform disks ?d=0.0651 m thick, made out of a material with a density of 5530 kg per cubic meter. If the new wheel is to have the same moment of inertia about its center as the old wheel about its center, what should the radius of the disk be?A 25-kg child stands at a distance r = 1.0 m from the axis of a rotating merry-go-round. The merry-go-round can be approximated as a uniform solid disk with a mass of 500 kg and a radius of 2.0 m. The moment of inertia of this system is
- A Texas cockroach of mass 0.246 kg runs counterclockwise around the rim of a lazy Susan (a circular disk mounted on a vertical axle) that has a radius 18.0 cm, rotational inertia 3.36 x 10³ kg-m?, and frictionless bearings. The cockroach's speed (relative to the ground) is 2.75 m/s, and the lazy Susan turns clockwise with angular velocity wo = 3.31 rad/s. The cockroach finds a bread crumb on the rim and, of course, stops. (a) What is the angular speed of the lazy Susan after the cockroach stops? (b) Is mechanical energy conserved as it stops? (a) Number Units (b)Suppose you have a long, thin rod of length 1.51m that is free to rotate about a fixed end. If the rod's composition is uniform (which means it has the same mass density all along its length), and if the mass of the rod is 0.6kg, what is the rod's moment of inertia (or rotational inertia) in units of kg*m2?A yo-yo is made of two uniform disks, each of mass M and radius R, which are glued to a smaller central axle of negligible mass and radius 0.5R (see figure). A string is wrapped tightly around the axle. The yo-yo is then released from rest and allowed to drop downwards, as the string unwinds without slipping from the central axle. Part (a) Find the moment of inertia, I, of the yo-yo with respect to an axis through the common centers of the disks, in terms of the mass and radius. Part (b) Find the linear speed V of the yo-yo, after it has descended a distance H. Part (c) Calculate the magnitude of the linear velocity V, in meters per second, of the yo-yo after it has fallen a distance 0.39 m
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