Question

when two right angled vector of magnitude 7 units and 24units combine , what is the magnitude of resultant​

Answer 1

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Explanation:

Just use simple cosine rule ( even simple Pythagoras theorem will work here as well! )

Here’s an outline…

|A| = 7 units & |B| = 24 units

After addition of two vectors, magnitude is given by,

|A+B| = √(|A|^2 + |B|^2 + 2|A||B|cosθ)

|A+B| = √(7^2 + 24^2 + 2×7×24×cos90)

|A+B| = √(49 + 576 + 2×7×24×0)

|A+B| = √(625)

|A+B| = 25 units.