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# 1. A 50 g mass oscillates at a frequency of 0.13 Hz. Assume that t = 0 when the mass is at its maximum displacement. At what time will its

1. A 50 g mass oscillates at a frequency of 0.13 Hz. Assume that t = 0 when the mass is at its maximum displacement. At what time will its displacement be zero? At what time will its amplitude be located at half of its amplitude?

2.A light spring and a 0.65 kg block are placed on a horizontal frictionless surface. The spring is compressed a distance of 6 cm and released to vibrate with SHM. If the spring constant is 10 N/m, what is the initial acceleration of the block? What is the initial force on the block?