GREPhysics.NET: GR8677 #7

GR8677 #7

Problem

GREPhysics.NET Official Solution

Alternate Solutions

Mechanics $\Rightarrow$ }Statics

Straight-forward Newtonian statics:

$F_x=0=F-T\sin(\theta)\Rightarrow T\sin(\theta)=F<br />$

$F_y=0=T\cos(\theta)-mg\Rightarrow T\cos(\theta)=mg<br />$

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.

Alternate Solutions

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Comments

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

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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.

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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

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