A solid cylindrical disk has a radius of 0.12 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. When a 40 N force is applied tangentially to the disk, perpendicular to the radius, the disk acquires an angular acceleration of 140 rad/s2. What is the mass of the disk?
here in Florida we drive 2 8' ground rods 6 feet apart and run #4 to ground a 200 amp service.
Most Codes require grounding both to a ground rod, AND to metalic cold water service where such exists. If you're going to plastic interior plumbing the ground should go to the metalic incoming line.
You can set up a grounding rod at the base of the house near the electric box, it's often a cleaner solution than using a water meter. They are cheap and easy to put in.
A solid cylindrical disk has a radius of 0.12 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. This means the solid cylindrical disk and the axle rotate at the same speed. Moment of inertia ? * mass ^ radius^2 ? * m * 0.12^2 0.0036 * m When a 40 N force is applied tangentially to the disk, perpendicular to the radius, the disk acquires an angular acceleration of 140 rad/s2. What is the mass of the disk? The 40 N force produces a torque on the disk, which causes the disk to accelerate. Torque Force * radius 40 * 0.12 Torque I * α 0.0036 * m * 140 Set the 2 equations equal to each other and solve for mass 0.0036 * m 40 * 0.12
