Question 1 1p = 100ON/m k = 100N/m 1kg ?kg A B Two mass-spring systems are suspended from the same moveable platform. If the platform is moved up and down along the same axis of the springs at a rate of 5 Hz, the mass in system A moves out of phase with the moveable platform, but system B moves only slightly out of phase and the amplitude of its motion increases. What must the mass in system B be? O 10 g 10000 g 100 g 1000 g