If let free on a vertical object. If the objects that affect the ground on time 5 seconds asking if the object affects the soil with a speed equal to how many meters/second.
If allowed to object falling vertically freely. If the object hits the ground at five seconds asking if the soil material at a speed of a few meters / second.
If you leave the object in the vertical fall freely. If the object is incident on the ground in time 5 seconds. Ask that the object the ground speed of a few meters / sec.