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

$\begin {array} {1 1} (1)\;16 & \quad (2)\;9.6 \\ (3)\;6.4 & \quad (4)\;3.2 \end {array}$

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(3) 6.4
answered Nov 7, 2013 by pady_1

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