The velocity of a particle is given as ⃗v = -x̂i + 2ŷj - ẑk m/s. The magnitude of acceleration at point (1, 2, 4) is m/s².

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(2) 9. aₓ = (dvₓ)/(dt) = -(dx)/(dt) = -vₓ = x; likewise a_y = 2(dy)/(dt) = 2v_y = 4y and a_z = -(dz)/(dt) = -v_z = z. At (1, 2, 4): ⃗a = (1, 8, 4). |⃗a| = √1 + 64 + 16 = √81 = 9 m/s².

The velocity of a particle is given as ⃗v = -x̂i + 2ŷj - ẑk m/s. The magnitude of acceleration at point (1, 2, 4) is ______ m/s².

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