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tan a = 4/3
sin a = 4/5
cos a = 3/5
v(0x) = v cos a = 100 x 3/5 = 60 m/s
v(0y) = v sin a = 100 x 4/5 = 80 m/s
i] v(x) = v(0x) = 60 m/s (tidak dipengaruhi gravitasi)
ii] v(y) di puncak = 0