When a force vector F=i+2j+k acts on a body and produces a displacement of S=4i+j+7k in 1 second then the power is
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Answer:
w=f.d
w=(i+2j+k)(4i+j+7k)
w=4+2+7
w=13
i×i=1, i×j=0, i×k=0
similar for j and k.
hope this helps.
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