A spring has a relaxed length of 26 cm (0.26 m) and its spring stiffness is 11 n/m. you glue a 69 gram block (0.069 kg) to the t
op of the spring, and push the block down, compressing the spring so its total length is 16 cm. you make sure the block is at rest, then at time t = 0 you quickly move your hand away. the block begins to move upward, because the upward force on the block by the spring is greater than the downward force on the block by the earth. calculate approximately y vs. time for the block during a 0.27-second interval after you release the block, by applying the momentum principle in three steps each of 0.09-second duration.
Standing waves can be thought of as a sin wave and a cos wave overlapping each other. They go in different direction hence Cis correct
Wave interference can be thought of as the opposite of destructive ---> constructive anda hencd meet and interact on the same medium such that answerBis correct
