College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- rod of length L = .9 m and mass mod = .1 kg connects two small balls of mass m = .2 kg each. The rod rotates about its midpoint with an axis perpendicular to the rod. The initial angular velocity is w, = 3 rad/s in the counterclockwise direction. A tangential force F = 9 N is applied to one of the spheres for 2 s causing the system to Rotation accelerate. a. What is the moment of inertia of the rod and ball m system? b. What is the torque acting on the system? Magnitude and direction? c. What is the angular acceleration of the system? d. What is the final angular velocity of the rod? e. What is the final speed v of one of the masses?arrow_forward3 1. A uniform solid sphere rolls without slipping down a 28° inclined plane. What is the acceleration of the sphere's center of mass? The moment of inertia of a uniform solid sphere about an axis that passes through its center = mr². The moment of inertia of a uniform solid sphere about an axis that is tangent to its surface = 7/5mr². m/s² E D C 4 22 R F % 5 V T G tv B MacBook Air 22 Y H 7 5 N 00 8 ZA 3 ( 9 K MOSISO O O V P command DUI 04 M optionarrow_forwardA 6 cm diameter, 550 g solid sphere is released from rest at the top of a 2.0 m long, 35° incline. It rolls, without slipping, to the bottom. a. What is the sphere’s angular velocity at the bottom of the incline?b. What fraction of its kinetic energy is rotational?arrow_forward
- Ï A disc (thin cylinder) of mass 0.29 kg and radius 0.75 m is rotating on a frictionless axle at a constant rate of 82 RPM. What is the moment of inertia for this disc? kg.m² A second disc of 0.14 kg and 0.41 m is dropped down the axle on top. The two then rotate together. What is the final moment of inertia for both discs together? kg/m² |=| |=arrow_forwardA system of point particles is shown in the following figure. Each particle has mass 0.43 kg, and they all lie in the same plane. 62 cm 49 cm axis 29 cm (a) What is the moment of inertia (in kg. m²) of the system about the given axis? kg-m² (b) If the system rotates at 5.6 rev/s, what is its rotational kinetic energy (in J)? Jarrow_forwardThree small steel balls are connected by rigid, very light rods as shown in the figure. What is the moment of inertia if the object rotates about the x-axis? If we apply a force of 200. N to the most massive ball such that the object will rotate counterclockwise about the x-axis, what angular acceleration will result?arrow_forward
- A person sits in a chair that is free to rotate without friction. Intheir hands, they hold two masses: Mass m1 = 5.0 kg a distance r1 = 0.35m from their body and mass m2 = 3.0 kg a distance r2 = 0.75 m from their body. a. What is the moment of inertia of the person and twomasses about a vertical axis that goes through the person? Hint: because of the choice of axis, we can ignore Iperson.arrow_forwardPhysics Angular Motionarrow_forwardA. A light, rigid rod of length L = 1.00 m joins two particles, with masses m_1 = 4.00 kg and m_2 = 3.00 kg, at its ends. The combination rotates in the xy-plane about a pivot through the center of the rod (see figure below). Determine the angular momentum of the system about the origin when the speed of each particle is 7.40 m/s. B. What would be the new angular momentum of the system (in kg · m2/s) if each of the masses were instead a solid sphere 13.5 cm in diameter?arrow_forward
- Suppose a disk with constant angular velocity has rotational kinetic energy 1280 J. If the moment of inertia of the disk is 35 kg-m?, then what is its angular velocity? 8.552 rad/s 9.066 rad/s С. 7.303 rad/s 10.07 rad/s 10.40 rad/s А. D. В. E. 10.14 rad/s F.arrow_forwardTWo metal disks,one with radius R, = 2.50 cm and mass M, = 0.90 kg and the Other with radius Rz =5.00 cm and mass M2= 2.00 kg , are welded together and mounted on frictionless axis through their common center. A.) What is the total moment of inertia of the two disks. B.)A light string is wrapped around the edge of the smaller disk, and a 1.50 kg block is suspended from the free end of the string. If the block is released from rest at a distance of 2.00 m above the floor, what is its speed just before it Strikes the floor. R2 1.50 kgarrow_forward
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