GREPhysics.NET
GR | # Login | Register
   
  GR8677 #7
Problem
GREPhysics.NET Official Solution    Alternate Solutions
Verbatim question for GR8677 #7
Mechanics}Statics

Straight-forward Newtonian statics:



Divide the two equations above, cancel T's, and get: \par
\tan(\theta)=\frac{F}{mg}=\frac{10}{2*10}=.5. Choice A is right.

See below for user comments and alternate solutions! See below for user comments and alternate solutions!
Alternate Solutions
There are no Alternate Solutions for this problem. Be the first to post one!
Comments
ernest21
2019-08-10 03:09:43
The problem specifically says y and x are unitless, so does that thinking still hold? drumming gamesNEC
joshuaprice153
2019-08-08 05:45:19
I simply stumbled upon your blog and desired to say that I possess really enjoyed browsing your current posts. keep doing your great job and always gain my support. cheers for sharing this beautiful article. commercial cleaningNEC
casseverhart13
2019-07-09 07:03:22
You\'re really properly informed and extremely intelligent. Orlando Towing Partners Waterford LakesNEC
JasonHupp
2018-07-30 11:06:29
Seems like every one must remember the formulas to do the sum and get desired answer.\r\nhttp://www.pumpkin.comNEC
pam d
2011-09-23 19:24:15
free points!NEC
Dodobird
2010-11-04 18:15:41
Any solution must involve horizontal and vertical components of force.
Tangents satisfy this requirement.
Because the box weighs 2 kg already we see gravity, the vertical force, will be larger.
Opposite/Adjacent < 1 means that only A satisfies this requirement.
NEC
signminus
2010-08-01 12:15:58
Not quite. The question asks for the angle, \theta. As in the posted solution, we have
\text{tan}(\theta)=0.5.
To invert this equation, we do
\text{tan}^{-1}(\text{tan}(\theta))=\text{tan}^{-1}(0.5)
\Longrightarrow \theta=\text{tan}^{-1}(0.5),
answer A.
signminus
2010-08-01 12:16:42
Oops, meant that as a reply to rlorek's comment below.
NEC
rlorek
2010-07-30 12:32:55
This was worked out well, but the answers are looking for "arc" functions which are the inverse of normal trig functions.

The inverse of tan(theta)=0.5 is...

arctan(theta)=2.0

Therefor "C" should be the correct answer.
flyboy621
2010-11-09 20:27:00
If tan \theta= .5 then \theta =arctan .5 .
NEC
belle
2009-10-11 13:50:56
This also solvable with simple geometric tactics

tan(theta)=\frac{10}{2g}

using g=10

tan(theta)=.5

NEC
kostas
2007-01-09 12:42:27
I see the answers but I cannot find the questions. Where are they? There was a "jump into the question" buton in the old site that I can't see now
yosun
2007-02-22 19:09:03
I am in the process of typing up the questions. Currently, only GR8677 is available as graphics file displayed next to the official solution. GR9277 questions will be available shortly, and the rest, eventually.
NEC

Post A Comment!
You are replying to:
The problem specifically says y and x are unitless, so does that thinking still hold? drumming games

Username:
Password:
Click here to register.
This comment is best classified as a: (mouseover)
 
Mouseover the respective type above for an explanation of each type.

Bare Basic LaTeX Rosetta Stone

LaTeX syntax supported through dollar sign wrappers $, ex., $\alpha^2_0$ produces .
type this... to get...
$\int_0^\infty$
$\partial$
$\Rightarrow$
$\ddot{x},\dot{x}$
$\sqrt{z}$
$\langle my \rangle$
$\left( abacadabra \right)_{me}$
$\vec{E}$
$\frac{a}{b}$
 
The Sidebar Chatbox...
Scroll to see it, or resize your browser to ignore it...