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Find the vector product of two vectors v...

Find the vector product of two vectors `veca =3i-4j+5k` and `vecb =-2i+j-3k`.

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The correct Answer is:
A, D
`1/2Iomega^2-0=0.1xx10xx1`
`rarr omega=sqrt20`
for collision `0.1xx12xxsqrt20x+0`
`=[((0.24)/3)xx12+(0.1)^2(1)^2]omega`
`rarr omega=sqrt(20)/([10xx(0.18)])`
rarr 0-1/2Iomega^2` =-m_1gI(1-costheta)`
`-m_2g1/2 (1-costheta)`
`rarr 1/2Iomega^2=-mgI(1-costheta)`
`-m-2g 1/2(1-costheta)`
`=0.1x10(1-costheta)`
`=0.1xx10(1-costheta)`
`-0.24xx10xx0.5(1-costheta)`
`rarr 1/2x0.18xx(20/324)=2.2x9(1-costheta)`
`rarr (1-costheta)=1/((2.2xx1.8))`
`rarr 1-costheta=0.252`
`rarr costheta=0.252`
`costheta=1-0.252=0.748`
`rarr W=cos^-1(0.748)=41^@`
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