Question

BF X 8.

A disk with a radial line painted on it is mounted on an axle perpendicular to it and running through its center. It is initially at rest, with the line at θ₀ = -90°. The disk then undergoes constant angular acceleration. After accelerating for 3.1 s, the reference line has been moved part way around the circle (in a counterclockwise direction) to θ_f = 130°.
Given this information, what is the angular speed of the disk after it has traveled one complete revolution (when it returns to its original position at -90°)?

|ω| =

Answer 1

sal" Here initial angular speed Wo zo speed is wat time t=3.is Hence wotwf xt or wf suppose final angular Of = 1306 hence o = 90+130=220 2e 2 or wf 2 2X227 3.1 141.9 deg/bec. 141.90 Now angular acceleration = wf 345.786 % t Bol for one complete revolution 0=360 Wo=0,2 =45.786 % hence w=w+228 or wz 228 or w=200 or lol Iwl = /2x45.786X360 z 181056 deg /s = 3-17 vool's NOC