Answer Happy

There are two different solutions to the same question, which is
correct?
https://www.answers.com/homework-help/que ... -q37618329
https://www.answers.com/homework-help/que ... -q38316720
Question 4 (marks 40/200) Figure Q4 shows a uniform disk attached to a shaft at A (in vertical plane). Disk has a mass (M) 15 kg and G is the mass centre. A constant torque of T = 50 Nm is exerted on the disk by the shaft at A and the disk starts rotating about the shaft's horizontal axis (perpendicular to the sheet). Initially time t = 0s and 1 = 00 1. Derive an expression for the resulting angular acceleration ë of the disk and calculate the angular acceleration at the instant 8 = 6 = 45° (15 marks) 2. Calculate the rotational speed (rpm) of the disk around A kinetic energy of the disk and the work done by the torque T after 8 = 450 (15 marks) 3. Calculate the radial force acting on the shaft by the disk and its direction with respect to Y axis, when at = 45°. Illustrate it on a free-body-diagram (10 marks) (List all your assumptions) 01m M= 15 kg х 1 T = 50 Nm і А Figure Q4 4