72000=1/2×m×v²
saat kecepatan diubah menjadi 1/4 semula
72000=1/2×m×(1/4v)²
72000=1/2×m×1/16×v²
72000/16=1/2×m×v²
4500=1/2×m×v²
Ek=4500J
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72000=1/2×m×v²
saat kecepatan diubah menjadi 1/4 semula
72000=1/2×m×(1/4v)²
72000=1/2×m×1/16×v²
72000/16=1/2×m×v²
4500=1/2×m×v²
Ek=4500J