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Acceleration of a particle moving along ...

Acceleration of a particle moving along the x-axis is defined by the law `a=-4x`, where a is in `m//s^(2)` and x is in meters. At the instant `t=0`, the particle passes the origin with a velocity of `2 m//s` moving in the positive x-direction.
(a) Find its velocity v as function of its position coordinates.
(b) find its position x as function of time t.
(c) Find the maximum distance it can go away from the origin.

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