A simple pendulum is $4\mathrm{.}00$ m long.

$($a$)$ What is the period of small oscillations for this pendulum if it is located in an elevator accelerating upward at $3\mathrm{.}00$ m$/$s$2?$

s

$($b$)$ What is the period of small oscillations for this pendulum if it is located in an elevator accelerating downward at $3\mathrm{.}00$ m$/$s$2?$

s

$($c$)$ What is the period of this pendulum if it is placed in a truck that is accelerating horizontally at $3\mathrm{.}00$ m$/$s$2?$

s