An object's two dimensional velocity is given by #v(t) = ( t^2 +2t , cospit - 3t )#. What is the object's rate and direction of acceleration at #t=7 #?
The rate of acceleration is
in the direction
The velocity is
Acceleration is the first derivative of the velocity
The object rate of acceleration is
The direction is
The angle is in the 2nd quadrant and is