2. A force F=(2i+3j-5k)N acts at a point r1=(2i+4j+7k)m. The torque of the force aboit the point r2=(i+2j+3k)m is?

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(2 ˆ i - 4 ˆ j + 2 ˆ k)

(3 ˆ i + 2 ˆ j - 4 ˆ k)

F = (2 ˆ i - 3 ˆ j + 4 k)

r = (3 ˆ i + 2 ˆ j + 3 ˆ k)

τ = r \times F

\to i + \to 2 j + \to 3 k

\to i - \to 2 j + \to 5 k

\to 3 j - \to 4 k

- \to 2 i + \to 3 j - \to 3 k

\to F = 4^i - 5^j + 3^k

_{1} =^i + 2^j + 3^k

_{2} = 3^i - 2^j - 3^k

\to F = (2 ˆ i - 3 ˆ j + 4 ˆ k) N

\to r = (3 ˆ i + 2 ˆ j + 3 ˆ k) m

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