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Verified answer
-------Diket :
Posisi awal, r1 = 10i - 4j
Posisi akhir, r2 = 7i + 3j
Tanya :
Vektor dan besar perpindahan, Δr = __?
Jawab :
Δr = r2 - r1
Δr = [7i + 3j] - [10i - 4j]
Δr = (7 - 10)i + (3 - (- 4))j
Δr = - 3i + 7j
Besar nya
|Δr| = √(- 3)² + 7²
|Δr| = √(9 + 49)
|Δr| = √58 meter
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FZA