(8%) Problem 11: Crates A and B have equal mass. Crate A is at rest on an incline that makes and angle of 0 = 30.6 degrees to horizontal. while crate B is at rest on a horizontal surface. b A 33% Part (3) Write an expression for the ratio of the normal forces,A to B, in terms of 8. Grade Summary IVA/NB = | Deductions (3% Potential 1mm Submissions Attempts remaining: 5 (% per attempt) detailed view Hints: 0% deduction per hint. Hints remaining: i Feedback: 0% deduction per feedback. i A 33% Part (b) What is the ratio of the normal forces,Ato B? i 3 33% Part (c) In which case is the normal force greater? (8%) Problem 12: Three ropes are connected to a metal ring of negligible mass, as shown in the diagram. A trafc light with a weight of F 5, =32? N hangs from rope I, which is vertical. Rope 2 and rope 3 are connected to a horizontal roof and make angles of :55 and 6 =32 ' with the horizontal, as shown. Let FT] , F n , and F13 be the tensions in ropes 1, 2, and 3, respectively. A coordinate system has been provided. o 3 20% Part (a) Write an expression for the vertical component of the net force on the trafc light. Grade Summary ZFlighw = I Deductions 0% Potential 100% Submissions Attempts remaining: 5 (0 % per attempt) 7 aniled view Submit Hint _ I give up! Hints: 0% deduction per hint. Hints remaining: i Feedback: 0% deduction per feedback. i 6 20% Part (b) Write an expression for the vertical component of the net force on the metal ring. i 3 20% Part (c) Write an expression for the horizontal component of the net force on the metal ring. E A 20% Part (d) Assuming that the system is non-accelerating, what is the value, in newtons, of the tension in rope 2? i a 20% Part (_e) Assuming that the system is non-accelerating, what is the value, in newtons, of the tension in rope 3? - "I-.. N