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If $\vec{F} = (60 \hat{i} + 15 \hat{j} - 3 \hat{k}) N and \vec{v} = (2 \hat{i} - 4 \hat{j} + 5 \hat{k}) m / s$ , then instantaneous power is :

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detailed solution

Correct option is B

P= F→.v→=(60i^+15j^−3k^).(2i^−4j^+5k^)= 60 (2) + 15 (-4) + (-3) (5)= 45 w

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If F→=(60i^+15j^−3k^)N and v→=(2i^−4j^+5k^)m/s, then instantaneous power is :

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Ready to Test Your Skills?

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If $\vec{F} = (60 \hat{i} + 15 \hat{j} - 3 \hat{k}) N and \vec{v} = (2 \hat{i} - 4 \hat{j} + 5 \hat{k}) m / s$ , then instantaneous power is :