Rubric4A

# Rubric4A - Quiz 4A DL Sec Grading Name First three letters...

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Impulse = Δ p = Σ F ave Δ t p = m v Quiz 4A DL Sec Grading: Last 6 digit of student ID: Name: First three letters of your family name 1. A soccer ball is traveling with initial velocity ( v i ) of 6 m/s to the left, as shown. A player kicks the ball so that its final velocity ( v f ) is 6 m/s in the direction shown. Indicate accurately the direction of the average force the player put on the ball. Show your work and explain how you got your answer; the answer alone won't receive credit! Average force the player exerts on the ball is in the same direction as the change in the momentum of the ball, i.e., p ball = F ave, player on the ball t Change in the momentum of the ball is given by, p ball = p f,ball p i,ball = m ( v f, ball v i, ball ) A grade (1. able to relate force, momentum, and velocity using Impulse equation. 2. Correct vector subtraction 3. correct labeling.) J 10.0 Used the impulse equation to relate average force to change in velocity; correct vector subtraction L 9.5 Used the impulse equation to relate average force to change in velocity; mistake in labeling subtracted vectors B grade (did two of the above correctly) I 8.5 Related force to change in velocity without using impulse; correct vector subtraction M 8.5

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## This note was uploaded on 10/26/2008 for the course PHY 7b taught by Professor Taylor during the Spring '08 term at UC Davis.

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Rubric4A - Quiz 4A DL Sec Grading Name First three letters...

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