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⠀→ A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 m s⁻² for 8.0 s. How far does the boat travel during this time ?​

Answer» <html><body><h3><u>Solution</u><u> </u><u>-</u></h3><p>We have,</p><ul><li>Initial velocity (u) = 0</li><li>Time (t) = 8.0 s</li><li>Acceleration (a) = 3.0 ms⁻²</li></ul><p>⠀</p><p>In this question, we have to <a href="https://interviewquestions.tuteehub.com/tag/find-11616" style="font-weight:bold;" target="_blank" title="Click to know more about FIND">FIND</a> the distance <a href="https://interviewquestions.tuteehub.com/tag/travelled-7256865" style="font-weight:bold;" target="_blank" title="Click to know more about TRAVELLED">TRAVELLED</a> by the boat during the <a href="https://interviewquestions.tuteehub.com/tag/given-473447" style="font-weight:bold;" target="_blank" title="Click to know more about GIVEN">GIVEN</a> time.</p><p>We will use the <a href="https://interviewquestions.tuteehub.com/tag/second-1197322" style="font-weight:bold;" target="_blank" title="Click to know more about SECOND">SECOND</a> equation of <a href="https://interviewquestions.tuteehub.com/tag/motion-1104108" style="font-weight:bold;" target="_blank" title="Click to know more about MOTION">MOTION</a>, i.e.,</p><p><img align="absmiddle" alt="\bf\longmapsto{\boxed{\pink{s = ut + \dfrac{1}{2}at^2}}}" class="latex-formula" id="TexFormula2" src="https://tex.z-dn.net/?f=%5Cbf%5Clongmapsto%7B%5Cboxed%7B%5Cpink%7Bs%20%3D%20ut%20%2B%20%5Cdfrac%7B1%7D%7B2%7Dat%5E2%7D%7D%7D" title="\bf\longmapsto{\boxed{\pink{s = ut + \dfrac{1}{2}at^2}}}"/></p><p>⠀</p><p>Here,</p><ul><li>s = distance travelled</li><li>u = initial velocity</li><li>t = time taken</li><li>a = acceleration</li></ul><p>⠀</p><p><strong><u>Putting</u></strong><strong><u> values</u></strong><strong><u> in</u></strong><strong><u> the</u></strong><strong><u> </u></strong><strong><u>formula</u></strong></p><p><img align="absmiddle" alt="\sf\dashrightarrow{s = 0 \times 8.0 + \dfrac{1}{2} \times 3 \times (8.0)^2}" class="latex-formula" id="TexFormula3" src="https://tex.z-dn.net/?f=%5Csf%5Cdashrightarrow%7Bs%20%3D%200%20%5Ctimes%208.0%20%2B%20%5Cdfrac%7B1%7D%7B2%7D%20%5Ctimes%203%20%5Ctimes%20%288.0%29%5E2%7D" title="\sf\dashrightarrow{s = 0 \times 8.0 + \dfrac{1}{2} \times 3 \times (8.0)^2}"/></p><p>⠀</p><p><img align="absmiddle" alt="\sf\dashrightarrow{s = 0 + \dfrac{3}{2} \times 64}" class="latex-formula" id="TexFormula4" src="https://tex.z-dn.net/?f=%5Csf%5Cdashrightarrow%7Bs%20%3D%200%20%2B%20%5Cdfrac%7B3%7D%7B2%7D%20%5Ctimes%2064%7D" title="\sf\dashrightarrow{s = 0 + \dfrac{3}{2} \times 64}"/></p><p>⠀</p><p><img align="absmiddle" alt="\sf\dashrightarrow{s = 3 \times 32}" class="latex-formula" id="TexFormula5" src="https://tex.z-dn.net/?f=%5Csf%5Cdashrightarrow%7Bs%20%3D%203%20%5Ctimes%2032%7D" title="\sf\dashrightarrow{s = 3 \times 32}"/></p><p>⠀</p><p><img align="absmiddle" alt="\frak\dashrightarrow{\purple{s = 96\:m}}" class="latex-formula" id="TexFormula6" src="https://tex.z-dn.net/?f=%5Cfrak%5Cdashrightarrow%7B%5Cpurple%7Bs%20%3D%2096%5C%3Am%7D%7D" title="\frak\dashrightarrow{\purple{s = 96\:m}}"/></p><p>⠀</p><p>★ <img align="absmiddle" alt="\small\underline{\sf{Thus,\: the\: boat\: travels\: a\: distance\: of\: 96\: metres.}}" class="latex-formula" id="TexFormula7" src="https://tex.z-dn.net/?f=%5Csmall%5Cunderline%7B%5Csf%7BThus%2C%5C%3A%20the%5C%3A%20boat%5C%3A%20travels%5C%3A%20a%5C%3A%20distance%5C%3A%20of%5C%3A%2096%5C%3A%20metres.%7D%7D" title="\small\underline{\sf{Thus,\: the\: boat\: travels\: a\: distance\: of\: 96\: metres.}}"/></p></body></html>


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