Question

28 A certain wheel turns through 100 rev in 15 s its angular speed at the end of the period being 12 rev/s (a) What was the angular speed of the wheel at the beginning of the 15-s interval, assuming constant angular acceleration? (b) How much time had elapsed between the time the wheel was at rest and the beginning of the 15-s interval?

29 A hoop of radius 2.5m has a mass if 150 kg. It rolls along a horizontal floor so that its center of mass has a speed of 0.25 m /s. How much work must be done on the hoop to stop it? Note, the moment of inertia of a hoop of mass m and radius R rotating about its cylindrical axis is mR².

Please provide the best explanation with a lot of details to get the point. I am taking hours to learn. I will really appreciate your work.Thank you.

Answer 1

using equatim of the motion 2 2. .32 D 3 iS 22S w482 S112S 424-3 942.3 112.S 376 γ /s -75.4-8.37 6 1s ぺ_ Her 4-4 g.37 6-04 4.4) 4-97

29 wosls ee y → sum of me 2 kinehe enegy tinenrl