I'm sure some of you have calculated and you're done already so it's nineteen eight two hundred minus fifteen six hundred and eighty you get three thousand five hundred and twenty so that means we have three thousand five hundred and twenty a then plus work f which is equals to zero so that means work as a result of friction it's equals two you just move all of this to the other side and it becomes negative 3520 remember this is work and it's measured in joules.
Okay ladies and gentlemen it's very much important that you fully understand this last part because it's not really just a matter of answering this question but instead to show you the tricks and how a you know to formulate and again how to substitute and what other a you know quantities mean okay so ladies and gentlemen they're just going to give you a mark for writing the correct formula okay very very much important ladies and gentlemen for correct substitution they must give you a mark okay and most importantly ladies and gentlemen
on the right side of the equa i mean of the equal sign
they also give you a mark okay guys i'm going to give you a mark for just
writing your final answer with the correct si unit. Okay so this is how you
score your five marks ladies and gentlemen i hope you enjoyed this lesson as
much as i did if you have watched this video until this far ladies and
gentlemen please make sure to like this video because it serves as a hint or as
a guide to me that a i'm not in any way confusing you and again you appreciate
the information that i provide to you guys so a ladies and gentlemen thanks very
much for joining my name is Desmond and i'm out.
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