the displacement in meters

 The displacement (in meters)of a particle moving in a straight line is given by the equation of motion 

s = 2/t2,

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 where 
t is measured in seconds. Find the velocity of the particle at times 

t = a, t = 1, t = 2, and t = 3.

t = a v =
 
m/s
t = 1 v = m/s
t = 2 v =  m/s
t = 3 v =

 

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