brainly bantuin plis sahabat

No. 6
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Diket :
posisi awal, r1 = 15i - 18j
posisi akhir, r2 = 18i + 19j

Tanya :
besar perpindahan, |Δr| = __?

Jawab :

Step 1
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Δr = r2 - r1
Δr = [18i + 19j] - [15i - 18j]
Δr = 18i + 19j - 15i + 18j
Δr = 18i - 15i + 19j + 18j
Δr = 3i + 37j

Step 2
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besar perpindahan 
|Δr| = √(3)² + (37)²
|Δr| = √(9 + 1369)
|Δr| = √1378
|Δr| = 37,12 meter


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