QMC%20Phys131WI10SOL-E1%281DA%2CGraph%2CVec%29MC%20long

# QMC%20Phys131WI10SOL-E1%281DA%2CGraph%2CVec%29MC%20long -...

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Unformatted text preview: Name _________________________Student ID _______________ Score___________ last first I. Velocity and Acceleration [12 pts] The figure shows the position vs. time plot of a boat that is positioning itself next to a dock. 1. At which of the labeled points is the boat at rest for a significant time? A 2. At which of the labeled points does the boat have the largest positive velocity? E 3. At which of the labeled points does the boat have the largest positive acceleration? D Below is a graph of the acceleration of a point particle as a function of time. a) 4. Which choice below is a possible graph of the position of the particle as a function of time? B b) c) Physics 131, WI 2010 Exam 1 QMC Phys131WI10SOLE1(1DA,Graph,Vec)MC long.doc Name _________________________Student ID _______________ Score___________ last first II. Free Fall [18 pts] This question and the next three are about the following situation. Two stones are released from rest at a height of 600 m, one 3 s after the other, and fall vertically downward. 5. During the time interval that both stones are in flight, the difference in their speeds will a. increase. b. decrease. c. stay the same. 6. During the time interval that both stones are in flight, the difference in their heights will a. increase. b. decrease. c. stay the same. 7. How long after the first stone hits the ground will the second stone hit the ground? a.. Δt < 3.0 s b. Δt = 3.0 s c. Δt > 3.0 s 8. What will be the height separation of the two stones 2.0 s after the second stone has been released? a. 18.7 m b. 31.4 m c. 53.8 m d. 103 m e. 165 m The next two questions are about the following situation. A ball is launched vertically upward from ground level with an initial velocity of 50 m/s. 9. How much time does it take before it lands on the ground? Use |g|=10 m/s2. a. 3 s b. 5 s c. 10 s d. 6 s e. None of the above. 10. What maximum altitude does the ball reach above the ground? Use |g|=10 m/s2. a. 125 m b. 250 m c. 150 m d. 500 m e. None of the above Physics 131, WI 2010 Exam 1 QMC Phys131WI10SOLE1(1DA,Graph,Vec)MC long.doc Name _________________________Student ID _______________ Score___________ last first IV. Circular Motion [9 pts] 11. A car moves at a constant speed while making a turn around a corner, which of the following is true? a. Acceleration is zero. b. Acceleration is in the direction of the car’s speed c. Acceleration is pointing toward the corner d. Acceleration is pointing away from the corner 12. In a uniform circular motion of 2,000 rpm. If the number of rotations doubles 4,000 rpm. What happens to the acceleration? a. The acceleration doubles. b. The acceleration doesn’t change. c. The acceleration is multiplied by 4 d. Depends on how big the centrifuge is. 13. Which of the following are constant for the entire trajectory of the pendulum? a. Tangential velocity b. Centripetal acceleration c. Tangential acceleration d. None of the above. V. Preflight question [6 pts] 14. A destroyer simultaneously fires two shells with the same initial speed at two different enemy ships. The shells follow the parabolic trajectory shown. Which ship gets hit first. a. Enemy 1 b. Enemy 2 c. Both ships are hit at the same time. Destroyer Enemy 2 15. At t=0 a ball, initially at rest, starts to roll down a ramp with constant acceleration. You notice it moves 1 foot between t=0 seconds and t = 1 second. How far does it move between t = 1 second and t = 2 seconds? a. 1 foot b. 2 feet c. 3 feet d. 4 feet e. 6 feet Physics 131, WI 2010 Enemy 1 Exam 1 QMC Phys131WI10SOLE1(1DA,Graph,Vec)MC long.doc ...
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## This note was uploaded on 10/24/2010 for the course PHY PHYSICS 13 taught by Professor Mylander during the Spring '09 term at Cal Poly Pomona.

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