1. 2014-2014 Term 1

2.  The expectation is that warm ups will be done 3 days a week with 2 questions on each day. Exception is week 8 due to PSAT  There are a few questions that do not have a multiple choice answer. There is either a grid-able on the answer sheet or a note.

4. 3. To test a scientific hypothesis you would A. find the best result and report only that result. B. set up many experiments and look at all the results. C. use the results of only the experiments that confirm the hypothesis. D. set up an experiment and look at the results. 4. The mass of a 100 paper clips is measured at 52.3 grams. The mass of a single paper clip from this group would be closet to A. 523 g B. 5.23 g C. 0.523 g D. 0.0523 g

5. 5. What type of graph is shown below? A. Circle B. Bar C. Line D. None of the above

6. 6. Which of the following measuring apparatus would be most precise?

7. 1. How many significant digits are in the following number, 0.000789mg. A. 7 B. 3 C. 6 D. None 2. How many meters are in 578cm? A. 5.78 m B. 0.578 m C. 57.8m D. 578 m

8. 3. A car travels 20 meters east in 1.0 second. The displacement of the car at the end of this 1.0 second is A. 20 m B. 20 m/s C. 20 m east D. 20 m/s east 4. A person walks 900 cm in 180 seconds, how fast did the person walk? (in m/s) A. 5 m/s B. 0.2 m/s C. 0.05 m/s D. 0.02 m/s

9. Use the position vs. time graph above to answer the following questions: 5. In which segment of the graph is the object not moving? A. B. C. D. 6. In which segment of the graph is the object moving the fastest? A. B. C. D.

10. 1. Which of the following targets is precise but not accurate?

11. 2. In the graphs above, periods of constant speeds are shown A. In graph B only B. In neither graph A nor B C. In both graphs A and B D. In graph A only

12. 3. When you are finished with a lab, you should A. Turn off, unplug and return any equipment B. Clean up the work area and wash your hands C. Dispose of waste materials properly D. All of the above 4. Which pair of graph represents the same motion?

13. 5. What is the velocity of the object after 5 seconds? (include the units) 6. Calculate the slope of the line (include the units)

14. 1. A car traveling at a speed of 25 m/s increases its speed to 30.0 m/s in 10.0 seconds. Calculate the magnitude of its acceleration. A. 5 m/s 2 B. 10 m/s 2 C. 50 m/s 2 D. 0.5 m/s 2 2. A racecar travels at an average speed of 95 m/s in a race. The total distance of the race is 850,000 m. How long does it take the racecar to finish the race? A. 746 s B. 8,947 s C. 60,200 s D. 850,000 s

15. 3. In which graph does the object move at a constant speed during the first 4 seconds, A or B? 4. Velocity is to speed as displacement is to A. Acceleration B. Time C. Gravity D. Distance

16. 5. A girl leaves a history classroom and walks 10. M North to a drinking fountain. Then she turns and walks 30 m south to her physics classroom. What is the girl’s total displacement from her history classroom to her physics classroom? A. 20 m South B. 20 m North C. 40 m South D. 40 m North 6. A car slows down from 32 m/s to 8 m/s in 4 s. Calculate the acceleration.

17. 1. A person walks 5.0 m north and 5.0 m east. His displacement is closest to A. 7.1 m NE B. 7.1 m NW C. 10 m NE D. 10 m NW 2. Which of the following is a scalar quantity? A. Displacement B. Distance C. Velocity D. Acceleration

18. 3. Solve the following formula for ∆T 4. What is the average velocity of a car that travels 30.0 m due west in 5 min? Report your answer in m/s. A. 0.1 m/s B. 6 m/s C. 0.1 m/s west D. 6 m/s west

19. 5. The diagram below shows a graph of distance as a function of time for an object in a straight-line motion. According to the graph, the object is most likely A. increasing in mass B. is slowing down C. is moving at constant speed D. is speeding up 6. If a hiker walks 5.0 m due North and then 7.0 m due east. What is the magnitude of her resultant displacement?

20. 1. Which of the following is a unit for force? A. Kilogram B. Newton C. m/s D. m/s 2 2. Jaime gives his little sister a piggyback ride. Jaime weighs 400 N and his little sister weighs 200 N. The normal force supplied by the floor must be A. 200 N B. 400 N C. 600 N D. More than 600 N

21. 3. A person kicks a door with a force of 48 N causing the door to accelerate at 12 m/s/s. what is the magnitude of the force exerted by the door on the person? A. 48 N B. 24 N C. 12 N D. 4.0 N 4. A box is pushed towards the right on a classroom floor. The force of friction on the box is directed toward the A. Left B. Right C. Ceiling D. Floor

22. 5. A mosquito flying over highway strikes the windshield of a moving truck. Compared to the magnitude of force of the truck on the mosquito during the collision, the magnitude of force on the truck is A. Smaller B. Larger C. The same D. Neither of the above 6. Acceleration is defined as A. The time it takes to move from one place to another B. The velocity of an object C. Distance divided by time D. Change in Velocity divided by time interval

23. 1. How long will it take for a car to accelerate from 15 m/s to 18 m/s at an acceleration of o.8 m/s 2 ? A. 2.20 s B. 3.75 s C. 4.28 s D. 5.13 s 2. Solve F = ma for a

24. 3. When a net force acts on an object, its acceleration depends on the object’s A. Initial speed. B. Mass. C. Volume. D. eight. 4. Whenever one object exerts a force on a second object, the second object exerts a force on the first that is A. Opposite in direction and equal in magnitude at the same time. B. In the same direction and equal in magnitude a moment later. C. Opposite in direction and greater in magnitude at the same time. D. In the same direction and weaker in magnitude a moment later.

25. 1. The Opportunity rover has a mass of 220 kg. On Mars, its weight is approximately 820 N. Calculate the acceleration of gravity on Mars. Show correct units 2. A cart starts from rest and travels a distance of 3.6 m in 1.8 s the average speed of the cart is A. 0.20 m/s B. 2.0 m/s C. 0.50 m/s D. 5.0 m/s

26. 3. Which of the following is a vector quantity? A. Jaime walking 3.4 km north towards PHS B. An object with a mass of 55 kg C. Jaime moving at 18 m/s D. A ball with an instantaneous speed of 5 m/s 4. In free-body diagrams, forces acting on an object are represented by arrows to show A. Magnitude and direction B. Acceleration C. Mass and acceleration D. Acceleration and direction

27. 5. What is the magnitude of the resultant of a 3.0 m displacement and a 4.0 m displacement as shown in the diagram? A. 1.0 m NW B. 5.0 m NE C. 7.0 m SW D. 12.0 m SE 6. A basketball thrown with a force of 18.5 N accelerates at 4.5 m/s 2 to the right. What is the mass of the ball? Show correct units