SeatWork4 : Rotational Motion ar X Seatwork4 (SW4) Rotational Moti X + V X > C A docs.google.com/forms/d/e/1FAlpQLSfBrq2m5GJ928hkUw0j7ejTaC_oZ3M9GvHGJ2Arqwzly6KOOg/viewform?hr_submission=ChklvMyQ8p4FEhAlzurCs9MOEgclyafl... @ @ 1. If the mass of the 12-m boom is 10-kg. Find the forces exerted by supports A and B. :2m 7 m 1 3 m 5 A B 40 N 80 N 2. A disc rotates through 10 rad in 4 s. If the disk starts from rest, determine its angular velocity after 4 s. 3. If the system rotates perpendicular to the page at A and has angular speed of 500rpm, find a) rotational kinetic energy (KER) b) angular momentum (L). 2 kg 3 kg : 120 cm 5 kg 250 cm 4 kg Note: question c) is not included c) How large a torque is needed to give it an angular acceleration of 4rev/s?? Ans: 675.47kg m'rad/s 4. A steel rod 3.0 m long has a cross-sectional area of 0.60 cm^2 . It is hung by one end from a support, and a 600-kg milling machine is hung from its other end. Determine the stress on the rod and the resulting strain and elongation. 9:49 AM Type here to search O 28'C Cloudy 10/30/2022