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# View of /trunk/NationalProblemLibrary/Rochester/setVecFunction3Motion/ur_vc_4_10.pg

Mon May 22 17:36:35 2006 UTC (7 years ago) by jjholt
File size: 1086 byte(s)
```Added tags.
```

```    1 ## DESCRIPTION
2 ## Calculus
3 ## ENDDESCRIPTION
4
5 ## KEYWORDS('vector' 'acceleration' 'multivariable' 'velocity' 'curvature')
6 ## Tagged by tda2d
7
8 ## DBsubject('Calculus')
9 ## DBchapter('Vector Functions')
10 ## DBsection('Motion in Space: Velocity and Acceleration')
11 ## Date('')
12 ## Author('')
13 ## Institution('Rochester')
14 ## TitleText1('')
15 ## EditionText1('')
16 ## AuthorText1('')
17 ## Section1('')
18 ## Problem1('')
19
20 DOCUMENT();        # This should be the first executable line in the problem.
21
23            "PGbasicmacros.pl",
24            "PGchoicemacros.pl",
26            "PGauxiliaryFunctions.pl");
27
28 TEXT( beginproblem() );
29 \$showPartialCorrectAnswers = 1;
30
31 \$a = random( 1, 10, 1 );
32 \$b = random( 1, 10, 1 );
33
34 \$ans = 1 / (\$a * \$b);
35
36 BEGIN_TEXT
37 A factory has a machine which bends wire at a rate of \$b unit(s) of curvature per
38 second. How long does it take to bend a straight wire into a circle of radius
39 \$a?
40   \$PAR
41 \{ans_rule(15)\} seconds
42 END_TEXT
43
44 ANS(num_cmp(\$ans));
45
46 ENDDOCUMENT();        # This should be the last executable line in the problem.
```

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