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Sample calculation

The predicted range was calculated as 2u_xu_y/g.

= 2x8.0x2.2/9.8 = 3.6 m

Using the uncertainties in the values of u_x and u_y, the maximum predicted range is ...

= 2x(8.0+0.3)x(2.2+0.3)/9.8 = 4.2 m

The predicted range = 3.6 ± 0.5 m/s