So, are you telling me to divide my answer by 2?
Because, in that case, the answer for both wires would be the same??
Except, my book has different answers for each wire: 69.6 N for the first one, 75.4 N for the second.
I'm sorry; I'm still confused :/
Tensions in Wires :)
Homework Statement
A 10.0-kg picture is held in place by two wires, one hanging at 50.0o to the left of the vertical and the other at 45.0o to the right of the vertical. What is the tension in the first wire? What is the tension in the second wire?
Homework Equations...
Thank you so much :)
That did work, but I'm still confused, as to why there wouldn't be a normal force pointing upwards? I always thought that if weight is pointing downwards, there would always be the normal force (the reaction force) pointing upwards?? :|
Homework Statement
A 400-kg box is lifted vertically upward with constant velocity by means of two cables pulling at 40.0o on either side of the vertical direction. What is the tension in each cable?
Homework Equations
Force = mass(acceleration)
Weight = mass(gravity)
The Attempt at a...
Ahhh! Stupid mistake...I was forgetting to make the acceleration caused by gravity negative! :O
Thank you so much! :)
Also, I have no idea how to mark this thread "SOLVED!" I even looked in "Thread Tools" & didn't see anything ://
Homework Statement
A 40.0 kg crate is being lowered by means of a rope. Its downward acceleration is 2.00 m/s2. What is the force exerted by the rope on the crate?
Homework Equations
Weight = mass(gravity)
Force = mass(acceleration)
The Attempt at a Solution
I solved it (look at...
Hmmm...
Well, this is one of our pre-labs question. And the lab is titled: Newton's Second Law of Motion. So I figured it had something to do with Newton's Laws?
Also, why do they include the thickness of the blocks, if it's just a simple trig question? :confused:
i don't think the link to my answer showed up, so to see it, please go here;
http://picasaweb.google.com/lh/photo/cnIZmcws9cN3v_1TDx7nfg?authkey=Gv1sRgCI-xv4Hl9tampgE&feat=directlink
Organic Chemistry Reactions - Check my Answers, Please! :)
this is the lab that we have to do in class:
http://academics.eckerd.edu/instructor/grove/gorgchem/Extraction%20Lab.pdf
http://picasaweb.google.com/lh/photo/cnIZmcws9cN3v_1TDx7nfg?authkey=Gv1sRgCI-xv4Hl9tampgE&feat=directlink
Homework Statement
Two calibrated elevation blocks have a combined thickness of 1.86 cm. Find the angle of elevation of the 1.00-m long track for this situation.
Homework Equations
F = ma?
The Attempt at a Solution
I'm having a LOT of trouble, even beginning to draw the picture for...
Homework Statement
A piece of string is cut into two pieces at a randomly selected point. What is the probability that the longer piece is at least x times as long as the shorter piece?
Homework Equations
none
The Attempt at a Solution
everyone in my family tried, but we couldn't...
that's what the book says the answer is.
but, I'm still really confused.
so the fact it's a double slit doesn't matter??
and that we don't know x and L?
this is a question that was in my REA SAT II physics book. we never studied this in my physics class a year ago. and there's no mention of it in my REA book. or other study books i have.