A pendulum of length 1.0m is hung from the ceiling of an elevator. The period of oscillation is observed to be 1.8s. Calculate the magnitude and direction of the elevator’s acceleration (take g=9.8ms−2).
a) 5.9ms−2 downward
b) 1.5ms−2 upward
c) 2.4ms−2 upward
d) 2.4ms−2 downward