Force exerted on the body,\(\text F\) = \(-\hat{i}+2\hat j+3\hat k\) \(\text N\)
Displacement, \(s\) = \(4\,\hat k\,m\)
Work done, \(W\) = \(\text F.s\) = (\(-\hat{i}+2\hat j+3\hat k\)) . (\(4\,\hat k\)) = \(0+0-3\times 4\) = \(12 \,\text J\)
Hence, \(12 \,\text J\) of work is done by the force on the body.
take on sth: | to begin to have a particular quality or appearance; to assume sth |
take sb on: | to employ sb; to engage sb to accept sb as one’s opponent in a game, contest or conflict |
take sb/sth on: | to decide to do sth; to allow sth/sb to enter e.g. a bus, plane or ship; to take sth/sb on board |
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