An object is dropped from 320m high. Find the time of motion and velocity when it hits the ground.

Answer 1

Ignoring air friction?
h=vo*t+1/2 g t^2
320=0-4.8 t^2 solve for time of flight t.
velocity= vo+gt but g=-9.8 m/s^2, you have t, solve for velocity. Vo is again zero.