For the three uncertainty calculations, you will have three changes. You will do

Question

For the three uncertainty calculations, you will have three changes. You will do calculations of this type on the lab. Use the given value of g, with its uncertainty. Remember: in WebAssign, all answers (including uncertainties) must have three significant digits. Look at the diagram in part 3 of procedure 1. Suppose the total mass of hook 2 is m_2 = 394.0 g 1.3 g, and theta= 61.80 degrees 0.18 degrees, and the system is in equilibrium. Find the following quantities, with uncertainties: - the total weight on hook 2. W_2 = N N - the magnitude of the force on hook 1. F_1 = N N - The magnitude of the total force on hook 3. F_3= N N

Explanation / Answer

(a) Total weight on hook 2 is mg

= 395.3×9.8 ± 392.7×9.8

= 3.87 N ± 3.85 N

(b) The magnitude of the force on hook-1 (F1) = [3.87N × cos] ± [3.85 × cos]

= [3.87N × cos 61.98º] ± [3.85 × cos 61.62º]

= 1.81 N ± 1.82 N

(c) The magnitude of the force on hook-3 (F3) = [3.87N × sin] ± [3.85 × sin]

= [3.87N × sin 61.98º] ± [3.85 × sin 61.62º]

= 3.41 N ± 3.38 N

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