Displacement of body is (5i→+3j→−4k→) m when a force (6i→+6j→+4k→) N acts for 5 sec. The power in watt is

s=(5i^+3j^−4k^)mt=(6i^+6j^+4k^)N⇒t=5 secPower P=F.St=(5i^+3j^−4k^).(6i^+6j^+4k^)5=30+18−165=325=6.4 W

Displacement of body is (5i→+3j→−4k→) m when a force (6i→+6j→+4k→) N acts for 5 sec. The power in watt is

s=(5i^+3j^−4k^)mt=(6i^+6j^+4k^)N⇒t=5 secPower P=F.St=(5i^+3j^−4k^).(6i^+6j^+4k^)5=30+18−165=325=6.4 W

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Displacement of body is $(5 \vec{i} + 3 \vec{j} - 4 \vec{k}) m$ when a force $(6 \vec{i} + 6 \vec{j} + 4 \vec{k}) N$ acts for 5 sec. The power in watt is

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Detailed Solution

$s = (5 \hat{i} + 3 \hat{j} - 4 \hat{k}) m$

$t = (6 \hat{i} + 6 \hat{j} + 4 \hat{k}) N \Rightarrow t = 5 \sec$

Power $P = \frac{F . S}{t} = \frac{(5 \hat{i} + 3 \hat{j} - 4 \hat{k}) . (6 \hat{i} + 6 \hat{j} + 4 \hat{k})}{5} = \frac{30 + 18 - 16}{5} = \frac{32}{5} = 6.4 W$

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Displacement of body is (5i→+3j→−4k→) m when a force (6i→+6j→+4k→) N acts for 5 sec. The power in watt is

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Displacement of body is $(5 \vec{i} + 3 \vec{j} - 4 \vec{k}) m$ when a force $(6 \vec{i} + 6 \vec{j} + 4 \vec{k}) N$ acts for 5 sec. The power in watt is