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Quiz1 1000

# Quiz1 1000 - Physics 1A-c 10AM CLASS Quiz 1 Oct 10 2008...

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Physics 1A-c 10AM CLASS Quiz # 1 Oct. 10, 2008 Prof. Jose Onuchic MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Maria throws two stones from the top edge of a building with a speed of 20 m/s. She throws one straight down and the other straight up. The first one hits the street in a certain time. How much later is it before the second stone hits? A) 6 s B) 5 s C) 4 s D) 3 s E) Not enough information is given to work this problem 2) A racquetball strikes a wall with a speed of 50 m/s and rebounds with a speed of 40 m/s. The collision takes 20 ms. What is the magnitude of the average acceleration of the ball during collision? A) 4500 m/s 2 B) 3000 m/s 2 C) 2000 m/s 2 D) Zero E) 500 m/s 2 3) Norma releases a bowling ball from rest; it rolls down a ramp with constant acceleration. After one quarter a second it has traveled 0.75 m. How far has it traveled after two seconds? A) 4.7 m B) 18.9 m C) 25.6 m D) 36.0 m E) 48.0 m

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