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Jawabannya:h max= Vo².sin²a/2. g
h max= 60².sin²53/2. 10
h max= 3600. (0,8)²/20
h max= 3600.0,64 /20
h max= 2304/20
h max= 115,2 m ----- maka posisi peluru pada detik ke 1 = 115,2
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