Answer to Question #134538 in Physics for Rohan

Question

If the z-axis is vertical and ŝ, φ̂, ẑ are unit vectors in cylindrical coordinates (standard symbols),

(a) ŝ is horizontal

(b) φ̂ is horizontal

(c) φ̂ is vertical

(d) ŝ is vertical

Answer 1

Only z-axis is vertical. Thus, both  ŝ and φ̂ lie in  horizontal plane.

Answer: (a) ŝ is horizontal; (b) φ̂ is horizontal