1 Answer

Eugen Mayer · Answer 1 · 2018-11-21T17:24:17+0000

The velocity function is given by the derivative of the displacement function.

$v(t)=(\mathrm ds(t))/(\mathrm dt)=-\frac2{t^3}$

You want to find the velocity at
t=2.5

, which would be

$v(2.5)=-\frac2{2.5^3}=-(16)/(125)=-0.128$

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