Question #c38d7

1 Answer
Andrew I.
Jan 7, 2018

#-24# feet per second

Explanation:

The displacement is given by #y=40t-16t^2# then velocity will be the derivative of this with respect to time:

#v = dy/dt=40-32t#

Now simply substitute in #t=2# to get:

#40-32(2)=40-64=-24# feet per second

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