Question

A simple pendulum is suspended from the roof of a trolley which moves in a horizontal direction with an acceleration a, then the time period is given by T = 2π√(l/g), where g is equal to

(a) g

(b) g - a

(c) g + a

(d) √(g² + a²)

Answer 1

Correct option  (d) √(g² + a²)

Explanation:

The effective value of acceleration due to gravity is√(g² + a²).