document.write( "Question 1166452: A motorboat accelerates uniformly from a velocity of 6.7 m/s to the west to a velocity of 1.4 m/s to the west. If its acceleration was 3.4 m/s^2 to the east,
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document.write( "how far did it travel during the acceleration? Answer in units of m. \n" );
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Algebra.Com's Answer #852753 by CPhill(2138) You can put this solution on YOUR website! This is a problem in one-dimensional kinematics that can be solved using the time-independent equation relating velocity, acceleration, and displacement.\r \n" ); document.write( "\n" ); document.write( "## 📐 Kinematics Calculation\r \n" ); document.write( "\n" ); document.write( "1. **Define Direction and Variables:** \n" ); document.write( " Let **West be the positive direction** ($+$).\r \n" ); document.write( "\n" ); document.write( " * Initial Velocity ($\vec{v}_i$): $6.7 \text{ m/s}$ West $\implies v_i = +6.7 \text{ m/s}$ \n" ); document.write( " * Final Velocity ($\vec{v}_f$): $1.4 \text{ m/s}$ West $\implies v_f = +1.4 \text{ m/s}$ \n" ); document.write( " * Acceleration ($\vec{a}$): $3.4 \text{ m/s}^2$ East $\implies a = -3.4 \text{ m/s}^2$\r \n" ); document.write( "\n" ); document.write( "2. **Select the Kinematic Equation:** \n" ); document.write( " Since the time is not given, we use the equation that relates the final velocity, initial velocity, acceleration, and displacement ($\Delta x$): \n" ); document.write( " $$v_f^2 = v_i^2 + 2a \Delta x$$\r \n" ); document.write( "\n" ); document.write( "3. **Solve for Displacement ($\Delta x$):** \n" ); document.write( " $$\Delta x = \frac{v_f^2 - v_i^2}{2a}$$\r \n" ); document.write( "\n" ); document.write( "4. **Substitute Values and Compute:** \n" ); document.write( " $$\Delta x = \frac{(1.4 \text{ m/s})^2 - (6.7 \text{ m/s})^2}{2(-3.4 \text{ m/s}^2)}$$ \n" ); document.write( " $$\Delta x = \frac{1.96 \text{ m}^2/\text{s}^2 - 44.89 \text{ m}^2/\text{s}^2}{-6.8 \text{ m/s}^2}$$ \n" ); document.write( " $$\Delta x = \frac{-42.93 \text{ m}^2/\text{s}^2}{-6.8 \text{ m/s}^2}$$ \n" ); document.write( " $$\Delta x \approx 6.3132 \text{ m}$$\r \n" ); document.write( "\n" ); document.write( "The distance traveled is the magnitude of the displacement.\r \n" ); document.write( "\n" ); document.write( "The distance the motorboat traveled during the acceleration is **$6.31$ m**. \n" ); document.write( " |