(6%) Problem 5: A uniform plank of wood has a mass of 21.1 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. & 50% Part (a) What is the magnitude, in newtons, of the force F2? Grade Summary F2 = N Deductions 0% Potential 100% sin() cos tan 7 9 HOME Submissions cotan() asin() acos() E 5 6 Attempts remaining: 5 (5% per attempt) atan( acotan() sinh( 1 2 3 detailed view cosh() tanh() cotanh() + END O Degrees O Radians VO BACKSPACE DEL CLEAR Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: 2 Feedback: 0% deduction per feedback. A 50% Part (b) What is the magnitude, in newtons, of the force F1