1.

If vecA=3hati+4hatj and vecB=7hati+24hatj, find a vector having the same magnitude as vecB and parallel and same direction as vecA.

Answer»

Solution :`|vecA|=sqrt(3^(2)+4^(2))=5`
also `|vecB|=sqrt(7^(2)+24^(2))=25`
desired VECTOR `=|vecB| hatA=25xx(3hati+4hatj)/(5)`
`=5(3hati+4hatj)=15hatj+20hatj`.


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