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| Topics: Linear motion, velocity, acceleration,
constant acceleration, gravity, freely falling body. Pre-requisite skills: An understanding of the kinematic equations of motion for constant acceleration. Approximate completion time: 30 minutes. |
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Provide sufficient detail to verify that the assignment was completed in a meaningful manner. |
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Applet by Angel Franco Garcia |
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| The above applet displays the position-time plot of a
particle launched vertically. 1. Set inital vertical position (Posicion) of the projectile to +100 meters and the initial velocity to 50 m/s. Press the Start (Empiaza) button. Once the projectile has reached the same level on its way down, press the Pause (Pauso) button. (a) How does the initial velocity vector compare with the final velocity vector when the particle reaches the same height that it started? (b) Notice that the acceleration is specified as 10 m/s2, not the more accurate 9.8 m/s2 value. If you changed the value to 9.8 m/s2, how would the original trajectory of the particle be changed? Would your answer to Question 1(a) be changed? Press the Continue (Continua) button, and once the projectile has reached the ground level (y = 0), press the Pause (Pauso) button. 2. One of the kinematic equations of motion is x = vot + (1/2) a t2. Using the displayed data, compare the numerical values for the left side of this equation to the right side of the equation. Use a percent difference to compare the two. Is this percent difference reasonably small? 3. According to the kinematic equation of motion, what shape is the displayed x(t) plot shown in the applet? |
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