(11%) Problem 8: A uniform plank of wood has a mass of 18.5 kg and a length of 2.0 m. A person holds the plank using both hands. The first hand exerts a downward force, F1, at an end of the plank. The second hand exerts an upward force, F2, at a distance of 50.0 cm from the same end of the plank. A 50% Part (a) What is the magnitude, in newtons, of the force F2? F2 = 1 N Grade Summary Deductions 05 Potential 100% sin() cos() tanO 7 8 9 HOME Submissions cotan( asinC acos() E 4 5 6 Attempts remaining: 5 (4% per attempt) atan() acotan( sinh( 2 3 detailed view coshO tanh() cotanh() + 0 EXP ODegrees O Radians VO BACKSPACE CLEAR Submit Hint Feedback (give up Hints: 1% deduction per hint. Hints remaining: 2 Feedback: 2% deduction per feedback. 50% Part (b) What is the magnitude, in newtons, of the force Fi