Asimple pendulum is 5.00 m long. what is the period of small oscillations for this pendulum if it is located in an elevator (a) accelerating upward at 5.00 m/s2? (b) accelerating downward at 5.00 m/s2? (c) what is the period of this pendulum if it is placed in a truck that is accelerating horizontally at 5.00 m/s2