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A particle's motion is described by x(t)=8t-2t2. (where x is in meters and t is in seconds)

f) How fast is the particle moving at t=3s?

______m/s

g) How much is it acceleration at t=3s?

______m/s2

1 answer

v=dx/dt =8-4t = 8 - 4•3= = -4 m/s.
a=dv/dt== - 4 m/s²

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