A mass of mass m, experiences a viscous drag, F and an upthrust, U as he descends towards the ground at a steady velocity, Using a parachute. If the acceleration of free fall is g, which of the following expressions is correct?
-
A.
FU = mg -
B.
U + F – mg = 0 -
C.
U – F = mg -
D.
F – U – mg = 0