Question

A disk starts from rest and rotates about fixed axis, subject to a constant torque. The work done by the torque during the first revolution is W.
1.draw a diagram of the disk.
2. write down an equation of work in terms of torque and angle.
3.what is the work done by torque during the second revolution?

Answer 1

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Torque (2) =It for Constant torone G x Angular acceleration is also constant Wi-o , Wp = (0) } 2xx(22) (in ineva za radian angle is a w=427 Covered) Wook-done (W) = 1/2 I WG ² - 1 Iw;? = 1 IX (ARX) - (w = 2TXI) — 0 for and nev. wf = wf = 54x d'=25 )2 + 2 2.0 = 422+ 2xx 2 = 845 ... Wook-done (W) = 1 I WP 2 - 1 2 1 2 2 = 1 / 2 1 (8xx - 4x2) 2 WIE W And for Second Ted rev. (WP = DON,