Welcome to PHY 121 Blog Help. Here's how it works. For each homework question and lab report we will make a post, this will probably contain a few tips on what the problems are about and how to solve them. If you are stuck on something then instead of emailing us directly you should post a comment in reply to the relevant post. We will try to guide you through tough points and help you understand the problems and the concepts behind them.
Friday, December 31, 2010
Ch4_1 #1
5 comments:
Anonymous
said...
I'm having some trouble getting this problem right.
I'm sure I'm doing right this problem (I did exactly what professor told to do) but it keeps saying "try again"............. 1) add additional vector (unlabeled)by copying one of existing vectors (F1 or F2) 2) move the unlabeled vector to another vector head (head to tail) 3) then add vector F3 4) draw F3 from the dot to the head of unlabeled vector
5 comments:
I'm having some trouble getting this problem right.
I'm sure I'm doing right this problem (I did exactly what professor told to do) but it keeps saying "try again".............
1) add additional vector (unlabeled)by copying one of existing vectors (F1 or F2)
2) move the unlabeled vector to another vector head (head to tail)
3) then add vector F3
4) draw F3 from the dot to the head of unlabeled vector
am I doing it right?
I am having the same issue as the second poster.
Re all:
What I see described by 9/20 1:18 pm is the vector sum of the two original vectors F1,2. ou have to cancel this sum by the vector F3.
The vector F3 should be opposite the vector sum of F1 and F2 thus draw the vector sum the oppisite direction to cancel out Vectors F1&F2
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