# What is the average speed of an object that is moving at #9 m/s# at #t=0# and accelerates at a rate of #a(t) =5-2t# on #t in [0,5]#?

##### 1 Answer

Nov 8, 2016

Average speed is the mean of initial velocity and final velocity.

to solve this question we need to take out final velocity (

so lets proceed.

therefore accereleration at 5 seconds is -5

by putting values this we get

so

=

I haven't showed the actual mathematics calculation as i hope you can easily make it,she see the procedure.