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Four persons K,L,M,N are initially at th...

Four persons K,L,M,N are initially at the four corners of a square of side d. Each person now moves with a uniform speed v in such a way that K always moves directly towards L, L directly towards M, M directly towards N, and N directly towards K. The four persons will meet at a time............. .

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SL ARORA-VECTORS-Example
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  11. Three vectors vec(A),vec(B) and vec(C) are such that vec(A) = vec(B)+v...

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  12. If |vec(A)+vec(B)| = |vec(A)-vec(B)|, find the angle between vec(A) an...

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  13. If vector P, Q and R have magnitude 5,12,and 13 units and vec(P)+vec(Q...

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  14. Determine the angles which the vector vec(A) = 5 hati + 0 hatj +5hat...

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  15. If hati and hatj are unit vectors along X-and Y-axis respective, then ...

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  17. If unit vectors hat(a) and hat(b) are inclined at angle theta, then pr...

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  18. If vec(A) +vec(B) = vec(C) and A^(2) +B^(2) = C^(2), then prove that v...

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  19. Calculate the area of the parallelogram whose two adjacent sides are f...

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