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r1 = (2,1) = 2i + j
r2 = (6,4) = 6i + 4j
Dit:
a. vektor perpindahan (Δr) ?
b. besar perpindahan ?
jawab:
a. Δr = r2 - r1
Δr = (6i + 4j) - (2i + j)
Δr = 6i - 2i + 4j - j
Δr = 4i + 3j
,
b. besar perpindahan = √4² + 3² = √16+9 = √25 = 5m