1º BACHILLERATO/FÍSICA/CINEMÁTICA/MOVIMIENTOS RECTILÍNEOS/MOVIMIENTOS ACELERADOS Frenado Un coche circula por una autopista con una velocidad de #vi Km/h. Ve un obstáculo y frena en #di m. Calcula:

Aceleración en m/s².
Tiempo de frenado en segundos.

]]> 1.0000000 0.3333333 0 0 aceleración = #atiempo = #t]]> <question><wirisCasSession><![CDATA[<session lang="es" version="2.0"><library closed="false"><mtext style="color:#ffc800" xml:lang="es">variables</mtext><group><command><input><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>di</mi><mo>=</mo><mo> </mo><mi>aleatorio</mi><mo>(</mo><mn>40</mn><mo>,</mo><mn>80</mn><mo>)</mo></math></input></command><command><input><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>vi</mi><mo>=</mo><mi>aleatorio</mi><mo>(</mo><mn>90</mn><mo>,</mo><mn>130</mn><mo>)</mo></math></input></command><command><input><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>vms</mi><mo>=</mo><mi>vi</mi><mo>/</mo><mn>3</mn><mo>.</mo><mn>6</mn></math></input></command><command><input><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>a</mi><mo>=</mo><mo>-</mo><msup><mi>vms</mi><mn>2</mn></msup><mo>/</mo><mo>(</mo><mn>2</mn><mo>*</mo><mi>di</mi><mo>)</mo></math></input></command><command><input><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>t</mi><mo>=</mo><mo>-</mo><mi>vms</mi><mo>/</mo><mi>a</mi></math></input></command><command><input><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>gx</mi><mo>=</mo><mn>0</mn></math></input></command><command><input><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>fc</mi><mo>(</mo><mi>x</mi><mo>,</mo><mi>y</mi><mo>)</mo><mo>:</mo><mo>=</mo><apply><csymbol definitionURL="http://www.wiris.com/XML/csymbol">begin</csymbol><mtable><mtr><mtd><apply><csymbol definitionURL="http://www.wiris.com/XML/csymbol">if</csymbol><mrow><mo>(</mo><mfenced close="|" open="|"><mrow><mo>(</mo><mi>x</mi><mo>-</mo><mi>a</mi><mo>)</mo><mo>/</mo><mi>a</mi></mrow></mfenced><mo><</mo><mn>0</mn><mo>.</mo><mn>02</mn><mo>)</mo></mrow><mrow><mi>gx</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>5</mn></mrow></apply></mtd></mtr><mtr><mtd><apply><csymbol definitionURL="http://www.wiris.com/XML/csymbol">if</csymbol><mrow><mo>(</mo><mfenced close="|" open="|"><mrow><mo>(</mo><mi>y</mi><mo>-</mo><mi>t</mi><mo>)</mo><mo>/</mo><mi>t</mi></mrow></mfenced><mo><</mo><mn>0</mn><mo>.</mo><mn>02</mn><mo>)</mo></mrow><mrow><mi>gx</mi><mo>=</mo><mi>gx</mi><mo> </mo><mo>+</mo><mn>0</mn><mo>.</mo><mn>5</mn></mrow></apply></mtd></mtr><mtr><mtd><mi>devolver</mi><mo> </mo><mi>gx</mi></mtd></mtr></mtable></apply></math></input></command></group></library></session>]]></wirisCasSession><correctAnswers><correctAnswer type="mathml"><![CDATA[<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>a</mi><mi>c</mi><mi mathvariant="normal">e</mi><mi mathvariant="normal">l</mi><mi mathvariant="normal">e</mi><mi>r</mi><mi>a</mi><mi>c</mi><mi mathvariant="normal">i</mi><mi>ó</mi><mi>n</mi><mo> </mo><mo>=</mo><mo> </mo><mo>#</mo><mi>a</mi><mspace linebreak="newline"/><mi>t</mi><mi mathvariant="normal">i</mi><mi mathvariant="normal">e</mi><mi mathvariant="normal">m</mi><mi>p</mi><mi>o</mi><mo> </mo><mo> </mo><mo>=</mo><mo> </mo><mo>#</mo><mi>t</mi></math>]]></correctAnswer></correctAnswers><assertions><assertion name="syntax_quantity"><param name="units"><![CDATA[m, s, g, °, ', ", sr, E, K, mol, cd, rad, h, min, l, N, Pa, Hz, W, J, C, V, Ω, F, S, Wb, b, H, T, lx, lm, Gy, Bq, Sv, kat]]></param><param name="unitprefixes">M, k, c, m</param><param name="groupoperators">(,[,{</param></assertion><assertion name="equivalent_function"><param name="name">fc</param><param name="notevaluate">false</param></assertion></assertions><options><option name="tolerance">10^(-4)</option><option name="relative_tolerance">false</option><option name="precision">4</option><option name="implicit_times_operator">false</option><option name="times_operator">·</option><option name="imaginary_unit">i</option></options><localData><data name="inputField">textField</data><data name="inputCompound">true</data><data name="gradeCompound">and</data><data name="gradeCompoundDistribution"></data><data name="casSession"/></localData></question>