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The position vectors of two balls are gi...

The position vectors of two balls are given by `vec(r)_(1)=2hat(i)+7hat(j) , vec(r)_(2)=-2hat(i)+4hat(j)` What will be the distance between the two balls?

Text Solution

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`vec(r)=vec(r_(2))-vec(r_(1))`
`vec(r)=-4hat(i)-3hat(j)`
Distance `=sqrt(4^(2)+3^(2))=5`
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