4.155 A homogeneous half-cylinder shell with radius r lies and swings on a rough horizontal surface. Determine a) the equation of motion b) the period of small oscillations. You have to draw the free body diagram The answaer of the question is; a)2r(r ccos)0 + rcsin00 + gcsin0 = 0 I r (-2 ) b)skipe the term witch have higher orning : t = 2 PLEASE ANSWER RIGHT WITH FULL AND EASY STEPS EXPLAIN EVERYTHING. DRAW PICTURE WITH LABEL EVERYTHING AND EXPLAIN THE PHYSICS, PRINICPLES BEHIND EVERY STEP THX.