1) The solution of dvdt+kmv = -g is A) v=cˉekmt−mgk B) v=c−mgkˉekmt C) v−kmt=c−mgk D) vkmt=c−mgk Answer: Option AExplanation:dvdt+kmv = -g → dvdt=−km(v+mgk) dvv+mg/k=−kmdt log(v+mgk) = −kmt+log c (v+mgk)=Ce−ktm = v=Cˉekmt−mgk