# An object's two dimensional velocity is given by #v(t) = ( t^2 +2t , 2cospit - t )#. What is the object's rate and direction of acceleration at #t=3 #?

##### 1 Answer

Jan 25, 2017

#### Answer:

Magnitude is

#### Explanation:

As

at

=

Hence object's rate is

=

and direction is given by