A block is kept on a frictionless inclined surface with angle of inclined ‘𝛼’. The incline is given an acceleration ‘a’ to keep the block stationary. Then a is equal to

Q: A block is kept on a frictionless inclined surface with angle of inclined ‘𝛼’. The incline is given an acceleration ‘a’ to keep the block stationary. Then a is equal to

(a) g

(b) g tan α

(c) g / tan α

(d) g cosec α

Ans: (b)