Physics, 02.08.2019 12:30 Lovebamagirl12
Aspring 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 top 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.
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Aparticle moves in the xy plane with constant acceleration. at time zero, the particle is at x = 6 m, y = 8.5 m, and has velocity ~vo = (9 m/s) ˆı + (−2.5 m/s) ˆ . the acceleration is given by ~a = (4.5 m/s 2 ) ˆı + (3 m/s 2 ) ˆ . what is the x component of velocity after 3.5 s? answer in units of m/s.
Answers: 1
Aspring has a relaxed length of 26 cm (0.26 m) and its spring stiffness is 11 n/m. you glue a 69 gra...
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