Starting from rest, a 6.70 kg object falls through some liquid and experiences a resistive (drag) force that is linearly proportional to the velocity of the object. It's measured that the object reaches half its terminal speed at 4.50 s.
a) What is the terminal speed for this object in this liquid?
b) At what time will the speed be 3/4 of the terminal speed?
c) How far will the object have traveled in the first 4.50 s of falling?