In a downtown office building, you notice each of the four sections of a rotating door has a mass of 75 kg. what is the width, in meters, of each section of the door if a force of 50 n applied to the outer edge of a section produces an angular acceleration of 0.410 rad/s2?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

The two required components for a generator are

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f