the ExpertTA.com 1 Student: telghazi2101@student.stcc.edu Class Management | Help Week8 Begin Date: 7/23/2023 12:01:00 AM -- Due Date: 8/1/2023 11:59:00 PM End Date: 8/10/2023 11:59:00 PM (20%) Problem 3: You have been hired to design a family-friendly see-saw. Your design will feature a uniform board (mass M= 9 kg, length L = 3.9 m) that can be moved so that the pivot is a distance d from the center of the board. This will allow riders to achieve static equilibrium even if they are of different mass, as most people are. You have decided that each rider will be positioned so that his/her center of mass will be a distance X offset = 18 cm from the end of the board when seated as shown. You have selected a child of mass my = 29 kg (shown on the right), and an adult of mass my = 82 kg (shown on the left) to test out your prototype. Otheexpertta.com A 50% Part (a) Determine the distance d in meters. d = Grade Summary Deductions 0% Potential 100%% sin() cos() tan() 3 ( 7 8 9 Submissions Attempts remaining: 999 cotan( asin() acos() E 4 5 6 (0% per attempt) atan() acotan() sinh( 1 2 3 detailed view cosh() tanh() cotanh() 0 Degrees O Radians Submit Hint I give up! Hints: 0% deduction per hint. Hints remaining: 3 Feedback: 0% deduction per feedback 50% Part (b) Determine the magnitude of the force exerted on the pivot point by the see-saw while in use in newtons. tent 9 2023 Expert TA, LLCWeeks Begin Date: 7/23/2023 12:01:00 AM -- Due Date: 8/1/2023 11:59:00 PM End Date: 8/10/2023 11:59:00 PM (20%) Problem 4: A picture of mass m = 12 kg is hung on a wall from a hook with a piece of wire. The picture hangs level and is centered on the hook. The tension in the wire is the same on both sides of the F hook. Each section of wire makes the same angle with the horizontal. Refer to the figure. T - - . . Otheexpertta.com A 33% Part (a) Choose the best free body diagram. Grade Summary O O Deductions 0% FT FT OFT Potential 100% FT FT Submissions Attempts remaining: 6 (0% per attempt) detailed view mg incexpertta. com mg incexpertta.com Ctheexpertta.com O O FT TFT FT Of - ma CAheexpertta.com ma Cibcexpertta.com Ctheexpertta.com Submit Hint Feedback I give up! deduction per feedback. Feedback: 0% deduction Hints: 0% deduction per hint. Hints remaining: 2 A 33% Part (b) Initially the picture is hung with a short wire, such that 01 = 110. What is the tension in the wire, in newtons. 33% Part (c) The wire is replaced with a longer wire. The picture now hangs with 02 = 410. What is the new tension in the wire, in newtons. All content @ 2023 Expert TA, LLCClass Management | Week8 Begin Date: 7/23/2023 12:01:00 AM -- Due Date: 8/1/2023 11:59:00 PM End Date: 8/10/2023 11:59:00 PM (20%) Problem 5: The figure shows the forearm of a person holding a book. The biceps exert a force FB, and the book has a mass of 3.4 kg. Triceps muscle Biceps muscle PHYSICS F CG m. = 2.5 kg W . 4.0 cm Wa 16 cm 38 cm CG FE] w CG 2 Calculate the magnitude of the force in the elbow joint in units of newtons. Grade Summary FE = 1 N Deductions Potential 100% sin() cos() tan() 7 8 9 Submissions 4 5 6 Attempts remaining 920 cotan() asin() acos() E per attempt atan() acotan() sinh() 1 2 detailed view cosh() tanh( cotanh() 0 Degrees O Radians VO Submit Hint I give up