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r1 = 3i + 5j
r2 = 7i + 8j
Dit: Vektor perpindahan dan besar perpindahan...?
jwb:
Δr = r2 - r1
Δr = (7i + 8j) - (3i + 5j)
Δr = (7i - 3i + 8j - 5j)
Δr = (4i + 3j)
jadi vektor perpindahannya = (4i + 3j)
dan besar vektor perpindahan
Δr = √4² + 3²
Δr = √16 + 9
Δr = √25
Δr = 5
besar vektor perpindahan = 5