Find the period of oscillation of a pendulum of length `l` if its point of suspension is
(a) moving vertically up with acceleration `a`
(b) moving vertically down with acceleration `a(lt g)`
(c) failing freely under gravity
moving horizontal with acceleration `a`.

Answer

A, B, C, D

Explanation

(a) `g_(e) = g + a`
(b) `g_(e) = g - a`
( c) `g_(e) = 0`
(d) `g_(e) = sqrt(g^(2) + a^(2))`