Question

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

Answer 1

Answer:

Option A and D denote the same position.

(a) 5 m, 30° north of east

(d) 5 m, 60° east of north​

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.