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A mass suspended from a string is nudged so that it starts to swing. Its angular displacement, , at time, t , is given by

A mass suspended from a string is nudged so that it starts to swing. Its angular displacement,

,

at time,

t,

is given by

= 12 e^{- 0.5 t} c o s (3 t) .

What is its position, velocity and acceleration

3

seconds after it has started swinging?

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