A force f=(i+2j-k) N displace a body S(i+j-2k) m in 10 s what is power developed
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P=(f.s)/t
{ (i+2j-k).(i+j-2k)}/10[rule of multiplication of dot product isi.i=1,j.j=1,k.k=1]
(1+2+2)/10
=5/10joule
=1/2joule power
.5joule power developed
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