Experiment 2 Error analysis :
1.s_l = Ö{[s_h²/h² + s_H²/H²]/l²}.
Many student did not know how to do this analysis.

3. Find H_max = H + s_H, and H_min = H - s_H
Also, W_max and W_min in the same way.
Then you have
A_max = H_max x W_max,      A_min = H_max x W_min
s_A = (A_max - A_min)/2

5.Let s_D = 0.02mm, s_L = 0.02mm, substituting these values into Example 1-6,p.12 calculation equation, and follow the example.

Attention: In Experiment 3 error analysis we use the similar way as No.5 above, the difference is that we use the graph to get the Slop_max - Slope_min = 2Dg.
The slope = Dy/Dx. where x is t² (not t), y is D.

In this experiment, we analize error in two ways: one is to see Dg(the smaller the more accurate), the other one is to compare your best g(the slope of the middle straight line in your graph) with the standard g in Northridge, g= 9.797m/s²(relative error in %)