Hi, could some one please explain in detail why this things are true? thanks A simple pendulum suspended in a rocket ship has a period T0. Assume that the rocket ship is near the earth in a uniform gravitational field. True: If the ship accelerates downward at 9.81 m/s2, the pendulum will no longer oscillate. False: If the ship accelerates upward, the period increases. True: If the length of the pendulum is doubled, the new period will be the square root of two times T0. False: If the mass of the pendulum is halved, the period decreases. False: If the ship moves upward with a constant velocity, the period increases.