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

##### 1 Answer

Jan 12, 2018

4.58

#### Explanation:

Acceleration of the object is given as,

So,velocity will be

Hence,displacement will be,

Hence,displacement with in t=2 to t=3 will be -4.58 meter

Now here distance=displacement that has happened in between 2 sec and 3 sec

Hence average speed with in this duration=(total distance covered/total time)

I.e