# What is the average speed of an object that is still at #t=0# and accelerates at a rate of #a(t) =t+3# from #t in [2, 4]#?

##### 1 Answer

Mar 4, 2016

Use the definition of acceleration and know that with respect to time,

#### Explanation:

Being still at

Starting from the acceleration definition:

So the average velocity between times 2 and 4 is:

Finally: