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3. b
h maks = (V0² sin²α)/2g
h maks = (V0²(sin α)²)/2g
h maks = (20² (sin30°)²)/(2.10)
h maks = (400 (1/2)²)/20
h maks = 20 . (1/4)
h maks = 5 m
4. c
f = banyak putaran tiap satu satuan waktu
f = putaran/detik
A - C = 60°
1 putaran penuh = 360°
f = putaran/sekon = (60/360)/1
f = 1/6 Hz
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5. c
F13 (K.(q1.q3)/r13²)
____ = ________________
F23 (K.(q2.q3)/r23²)
coret-coret yang sama
