30 BAB III EVALUASI 3.1 Kunci Jawaban ̂ ̂ ⃗ ⃗ ⃗⃗ ⃗ ⃗ ⃗⃗ ⃗ ⃗⃗ ⃗ ∙ 1. ( × ) ∙ = 4, ( ∙ ) = −4 ̂ + 2 ̂ + 2 , ( ) = 6 ̂ + 6 2. W = 80 ⃗⃗ ⃗⃗ 3. Karena C vektor konstan sebarang maka ∮ ⃗ × = ∬ ( × ) ×