Question

a particle is subjected to two displacement as follows: 30m to the northeast and 40m to northwest. what must be third displacement if the particle is to end up at the starting point

Answers

bobpursley
notice the right triangle in the vector diagram. 3,4,5 triangle...so 50m is the displacement magnitude

Now for the angle.
sketch it.

I see at the bottom angle, the angle
arccos 30/50-PI/4, E of S. or 8.1 deg E of S

check that.
Andrew
a particle is subjected to two displacement as follows: 30m to the northeast and 40m to northwest. what must be third displacement if the particle is to end up at the starting point

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