1 answer

A 2kg ball with initial speed 2m/s vertically downwards falls a distance of 4m if the...

Question:

A 2kg ball with initial speed 2m/s vertically downwards falls a distance of 4m if the air resistance does -20J of work on the ball, what is it's final speed assume only gravity and air resistance act on the ball. ANSWER is 8m/s How did you get that ANSWER, THANKS.


Answers

mass ofball (m):2kg lets, assume inhal height th be h then, initial PE=mgh ome final enemy-上mvhmgCh-4) Since Workdome against a r resistance is -20丁 ー20 (2) (2nys )2-20 = L (2) v2ー(2)(9-8)(4) 62.4Alright Dude, If that worked for you... dont forget to give THUMBS UP.(that will work for me!)

If I missed something feel free to leave a comment.
atleast before giving downvote.

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