.....at : https://www.physicsclassroom.com/mmedia/newtlaws/efff.cfm
and a suggestion from :
https://www.quora.com/Can-an-object-falling-to-Earth-get-a-higher-acceleration-than-9-81-m-s-2
so to apply as : www.geocities.ws/iacob_alex/Some_Drafts/text048.jpg
Al_ex