# 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=5 #?

##### 1 Answer

Nov 18, 2016

#### Answer:

#### Explanation:

Evaluate both at t = 5:

The acceleration vector is:

The magnitude of the acceleration is:

The direction is:

Note: we add