The cart in figure 1 rests on a ramp which is inclined 30 degrees with respect to the horizontal. At t=0s the cart is released from rest(i.e with no initial velocity). As indicated, the air resistance is proportional to the velocity squared.
See attached.© BrainMass Inc. brainmass.com July 15, 2018, 4:58 pm ad1c9bdddf
The solution contains a word document with a step by step answer. It also contains the MATLAB/SIMULINK analysis of the question in an attachment. The solution are easy to follow and learn with a schematic diagram.