Question

when two vectors magnitude A and B are inclined at angle thetha. The magnitude their resultant 2A If the first vector is double the magnitude of resultant become 3A Find the ratio of A square and B square?

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Answer 1

Answer:

When the angle is θ, the magnitude of resultant is 

2P=P2+Q2+2PQcosθ                       (1)

When the angle is 180−θ, the magnitude of resultant is 

P=P2+Q2+2PQcos(180−θ)            (2)

Squaring and adding the two equations, we get

2P2+2Q2=5P2

2Q2=3P2

QP=32

Explanation:

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Answer 2

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