Diketahui:

<img align="middle" alt="s equals open parentheses t plus 2 close parentheses straight m
t equals 1 blank straight s" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»s«/mi»«mo»=«/mo»«mfenced separators=¨|¨»«mrow»«mi»t«/mi»«mo»+«/mo»«mn»2«/mn»«/mrow»«/mfenced»«mi mathvariant=¨normal¨»m«/mi»«mspace linebreak=¨newline¨/»«mi»t«/mi»«mo»=«/mo»«mn»1«/mn»«mi»§#160;«/mi»«mi mathvariant=¨normal¨»s«/mi»«/math»" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAE0AAAAiCAYAAAAaq1Q/AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAASM53j1gAAAhtJREFUeNrtmT9LAzEYxg+RIlIEERHp4CLi0E1EnFwcREREcBAHEcHBLyBFHPwKRVxFRFwOEXEVBxHXIiJScCgOUgoiIlJKoT7Rt1DCtZe7S66xvA/8KL0/Se655E3ynuOwWJ2oDNhtc/2Z/2TYIjizoB2n1Bbr1Q1ewECEMmoK1yyAW1Ch30OQlK4RbciDhO2mbYJsxDJUTLsCM6CroV7X47osnbNaLvUCWccBhkotRL3CvO8mPdLV8WCz4AFUqYGpFo1vhZeKHsMkL92XMmDaCIUFWb2gJJU9Dm7I5EewDdbJkzJ4BcvyGylRJSZUbRLnvnxMCvOCGnUJlpqcq0h1HYEp+j9Jxy7omPBnQjL6NyiWZScNmzYNrjXHtLqSCrNkxadspWOiK76De9AXoQd46c2jzFV6u7pNG6KlzaiPqUUdptULy4GVGCYCMYNtaTatH5zTr9/SxNVl2iB4oqBoeskhhs++ZtNEDEsrXHcANqKa9kEHCmDNQExL0GzZuLgdpkBb07jQVAkZYvg+S3VG6mm8jbJ0w97ODfMe2OG8CYvFYrFYLBYrrMZoUZljK9R1QpvjWic+XJB8fdjNdEdJJV8fNfUcxDSRQRY5+arNZvvl6+PuaZ+Oue8V2hQ0X2/aNJHvEtmIHptNU8nXxzk8Reb4zvn7tjBnq2lB8/VxTQTzZJyVCpqvj8u0tM2mmcjXtxrWqvcUbByePyODuiHv6bPIAAABKHRFWHRNYXRoTUwAPG1hdGggeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzE5OTgvTWF0aC9NYXRoTUwiPjxtaT5zPC9taT48bW8+PTwvbW8+PG1mZW5jZWQgc2VwYXJhdG9ycz0ifCI+PG1yb3c+PG1pPnQ8L21pPjxtbz4rPC9tbz48bW4+MjwvbW4+PC9tcm93PjwvbWZlbmNlZD48bWkgbWF0aHZhcmlhbnQ9Im5vcm1hbCI+bTwvbWk+PG1zcGFjZSBsaW5lYnJlYWs9Im5ld2xpbmUiLz48bWk+dDwvbWk+PG1vPj08L21vPjxtbj4xPC9tbj48bWk+JiN4QTA7PC9taT48bWkgbWF0aHZhcmlhbnQ9Im5vcm1hbCI+czwvbWk+PC9tYXRoPmB3HXcAAAAASUVORK5CYII=" style="max-width: none;" />

Ditanya: v

Jawab:

<img align="middle" alt="table attributes columnalign right center left columnspacing 0px end attributes row s equals cell open parentheses t plus 2 close parentheses straight m end cell row straight v equals cell straight s over straight t end cell row blank equals cell fraction numerator straight t plus 2 over denominator straight t end fraction end cell row blank equals cell fraction numerator 1 plus 2 over denominator 1 end fraction end cell row blank equals cell 3 space bevelled straight m over straight s end cell end table" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mtable columnspacing=¨0px¨ columnalign=¨right center left¨»«mtr»«mtd»«mi»s«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mfenced separators=¨|¨»«mrow»«mi»t«/mi»«mo»+«/mo»«mn»2«/mn»«/mrow»«/mfenced»«mi mathvariant=¨normal¨»m«/mi»«/mtd»«/mtr»«mtr»«mtd»«mi mathvariant=¨normal¨»v«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mfrac»«mi mathvariant=¨normal¨»s«/mi»«mi mathvariant=¨normal¨»t«/mi»«/mfrac»«/mtd»«/mtr»«mtr»«mtd/»«mtd»«mo»=«/mo»«/mtd»«mtd»«mfrac»«mrow»«mi mathvariant=¨normal¨»t«/mi»«mo»+«/mo»«mn»2«/mn»«/mrow»«mi mathvariant=¨normal¨»t«/mi»«/mfrac»«/mtd»«/mtr»«mtr»«mtd/»«mtd»«mo»=«/mo»«/mtd»«mtd»«mfrac»«mrow»«mn»1«/mn»«mo»+«/mo»«mn»2«/mn»«/mrow»«mn»1«/mn»«/mfrac»«/mtd»«/mtr»«mtr»«mtd/»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»3«/mn»«mo»§#160;«/mo»«mfrac bevelled=¨true¨»«mi mathvariant=¨normal¨»m«/mi»«mi mathvariant=¨normal¨»s«/mi»«/mfrac»«/mtd»«/mtr»«/mtable»«/math»" role="math" src="data:image/png;base64,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" style="max-width: none;" /> 
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; 
Jadi, jawaban yang tepat adalah 3 m/s.

Sebuah benda bergerak dengan persamaan posisi <img align="middle" alt="S equals t plus 2" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»S«/mi»«mo»=«/mo»«mi»t«/mi»«mo»+«/mo»«mn»2«/mn»«/math»" role="math" src="data:image/png;base64,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" style="max-width: none;" /> (s dalam meter dan t dalam sekon) Tentukan kecepatan saat t = 1 sekon!

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Sebuah benda bergerak dengan persamaan posisi (s d...

Jawaban: