Here are certain positions of a particle which can move in a horizontal plane. Two of them denote identical positions. Identify these positions: (a) 5m, 30° north of east (b) 5m, 30° east of north (c) 5m, 60° south of west (d) 5m, 60° east of north?

1 Answer
MAXIMILIAN C.
Apr 13, 2018

A and D.

Explanation:

Saying 30 degrees NofE is the same thing as 60 degrees EofN - Since there are 90 degrees in between North and East, and #30+60=90#, these angles must be coterminal (they have the same endpoints), and since the length is the same (#5m#), they must refer to the same position.

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