Answer the vector problem
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Net force = (3i+2j+3k) + (2i+j-3k)
= 5i+3j
displacement = (4i-3j+7k) - (2i-j-3k)
= 2i-2j+10k
Work done = Force•displacement (In vector form)
= (5i+3j)•(2i-2j+10k)
= 10-6 units
= 4 units (c is correct option )
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