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Find the kinetic energy of a particle of...

Find the kinetic energy of a particle of mass `200 g` moving with velocity `3hat(i)-5hat(j)+4hat(k) m//s`.

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The correct Answer is:
`5 J`
Speed `=|vec(v)|=sqrt(9+25+16)=5sqrt(2) m//s`
`K.E=1/2mv^(2)=1/2xx200xx10^(-3)xx50 J=5J`
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