Asked by matt
A block with a mass of 2.85 kg is hung by a vertical spring of stiffness 13.3 kg/s2. The damping force is given by -b(dx/dt)m where b = 364 g/s. The block is pulled down 12 cm and then released.
(a) Calculate the time required for the amplitude of the resulting oscillations to fall to 45 % of the initial amplitude.
(b) How many full oscilltions are made by the block in this time?
(a) Calculate the time required for the amplitude of the resulting oscillations to fall to 45 % of the initial amplitude.
(b) How many full oscilltions are made by the block in this time?
Answers
Answered by
Damon
stiffness must be force/distance, for example Newtons/meter. kg is mass, not force and I have no idea what s2 means.
similarly b *dx/dt would be a force in Newtons where b would have units Newtons seconds/ meters
similarly b *dx/dt would be a force in Newtons where b would have units Newtons seconds/ meters
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