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Q8 - on the vertical axis showing your work clearly below...

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Physics 7B Quiz 8 Grade: DL Section: Name: _______________________ ID: _______________________ I certify by my signature that I will abide by the code of academic conduct of the University of California. Signature No books or notes. Calculators OK. Show all your work below. Answers alone do not receive credit! A ball flies through the air with no resistance, then bounces off a wall elastically. We consider here only the x-coordinate of the ball. 1. (1.5 pts) Please fill in the graph of velocity versus time. Assume that while in contact with the wall the ball experiences constant acceleration. 2. (1.5 pts) Now please fill in the graph of acceleration versus time. 3. (1.5 pts) Assume that the initial velocity of the ball is 3 m/s. From the fact that the ball is in contact with the wall for 1 second, determine the acceleration, and label its value

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Unformatted text preview: on the vertical axis, showing your work clearly below. constant acceleration: x(t) = x + v t + 1/2 at 2 v(t) = v + at 2 Quiz 8 Rubric Problems 1&2: C(1.5) - correct R(1.25) - correct shape but upside-down, shifted vertically, or used time intervals incorrectly. Q(1.0) - incorrect in 1s time interval W(1.0) - incorrect outside 1s interval E(0.5) - incorrect inside and outside interval Problem 3: C(1.5) - correct D(1.4) - incorrect direction R(1.4) - math error Q(1.25) - said vf=0 or vi=0, resulting in a=3 or -3 m/s^2 W(1.0) - said deltav=0, therefore a=0 E(.75) - used wrong equation or used the right equation incorrectly. T(.75) - incorrect (and non-zero) velocities. Answers varied. S(.75) - wrote relevant equations, unfinished Y(0.5) - unclear/unjustified/major conceptual error Z(0.0) - blank...
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Q8 - on the vertical axis showing your work clearly below...

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