Question
The torque of the force →F = (2^i - 3^j + 4^k) N acting at the point →r = (3^i + 2^j + 3^k) m about the origin be
Answer: Option B
:
B
→τ = →τ × →F= ⎡⎢
⎢
⎢⎢^i^j^k3232−34⎤⎥
⎥
⎥⎥
= [(2 × 4)-(3 × -3)]^i + (2 × 3)-(3 × 4)]^j + (3 × -3)-(2 × 2)]^k
= 17^i - 6^j - 13^k
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:
B
→τ = →τ × →F= ⎡⎢
⎢
⎢⎢^i^j^k3232−34⎤⎥
⎥
⎥⎥
= [(2 × 4)-(3 × -3)]^i + (2 × 3)-(3 × 4)]^j + (3 × -3)-(2 × 2)]^k
= 17^i - 6^j - 13^k
Was this answer helpful ?
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