A particle moves in a straight line in such a way that the a=-w²x when its displacement from a fixed point 0 on the line. a.  find the expression for the displacement b. If w=3 and the particle is initially at rest 5units from the origin, find (i) its speed when it is 3 units from the origin. (ii) How long it takes to reach the origin O from the first time

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Projectile Motion