Answer:
I would say at least 3 seconds
Step-by-step explanation:
This may not be 100% accurate this is my opinion this could help give you an idea also let me explain. If the acorn fell 6 meters off the ground at 1.5 meters in my opinion it should go by 2 meters for every 1.5 meter in this order 1.5, 3, 4.5 and 6!