A container with mass m kg is dropped by a helicopter fromheight h km at time t=0, with zero velocity. from the outset, itsfall is controlled by gravity and the force of air resitance, f(v)=-kv, where v is the current velocity of the container. in t secondsafter the drop, a parachute opens, resulting in an increase of airresistance up to f(v) = -kv. determine the time t at which thecontainer touches the ground. and its velocity at this moment. if m= 200 kg, h = 2000 m, t = 20 s, k = 10 kg/s, and k = 400 kg/s
