123. A disk of mass m, radius R, and area A has a surface (see the following figure). What is mass density o= m AR the moment of inertia of the disk about an axis through the center? Axis of rotation
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- A horizontal, uniform, 8.00-kg, stationary, solid disk with a radius of 80.0 cm is pivoted at its center such that the plane of the disk is parallel to level ground. A boy applies a tangential force of 40.0 N on the disk by pulling on a rope that is inserted in a side groove of the disk. Through what total angle will the disk rotate in 5.00 s? a. 124 rad b. 156 rad c. 108 rad d. 140 rad e. 92.0 radA cylinder with a radius of 13 meters and a mass of 8.5 kg rolls without slipping, traveling at 6 m/s. What is the total K.E. of the cylinder in J?Practice Problems: Torque Physics 1. A 200 g mass is placed on the meter stick 20 cm from the fulcrum. An unknown mass is positioned 8 cm from the fulcrum to balance the system. What is the mass of this unknown object? Unknown mass T = rx F Page rccw Fulcrum rcw 2. A 250 g mass is placed on the meter stick 30 cm from the fulcrum. An unknown mass is positioned 40 cm from the fulcrum to place the system in equilibrium. What is the mass of the unknown object? 1 / 2 Load: 200-g mass +