1. Semester 1 Final Exam Review Covering: Topic 1; Mechanics; Take out: your notes, your book (if you brought it), a whiteboard

2. Instructions You will work together as a team within your seating group It will not be necessary to answer in the form of a question… It WILL be necessary to show complete work, or draw diagrams, or do something else to visually represent your answer on your whiteboard Raise your hand when you’re done and your answer will be checked and appropriate scores awarded.

3. Semester Finals Jeopardy Physics Phundamentals What goes up must come down Get a move on! May the Force be with you Impulses, Crashes, and Coasters 10 20 30 40 50

4. As of Jan. 16, 2012, there were approximately 312,859,385 people living in the United States. Report this number in terms of its Order of Magnitude Answer

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6. List 5 of the 7 fundamental metric units Answer

7. Game board Fundamental Metric Units Length: Meter Time: Second Mass: Kilogram Amount of material: Mole Electric Current: Ampere Light intensity: Candela Temperature: Kelvin

8. 37.5 m·s -1 is equivalent to how many km·h -1 ? Answer

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10. A motorcycle accelerates at a rate of 17.5 km·h -2. What is its acceleration in m·s -2 ? Answer

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12. A mass is measured to be m=4.4±0.2 kg, and is moving with a speed v=18±2 m·s -1. find the absolute uncertainty in the kinetic energy of the mass. Answer

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14. Including both direction and units, what is the average acceleration due to the gravitational field of Earth Answer

15. Game board 9.81 m ·s -2 towards the center of the Earth

16. What is the force of gravity that causes a 75.0 kg mass to accelerate (assume that air resistance is negligible) Answer

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18. A basketball is thrown upwards with an initial velocity of 8.75 m·s -1. To what maximum height will it reach? Answer

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20. Describe 2 factors that will increase the effect of air resistance acting on a falling body. Answer

21. Game board 1. Increased surface area 2. Decreased mass 3. Increased velocity

22. A ball is tossed up into the air from a point 2.50 m above the ground with a velocity of 3.68 m·s -1. How much time will it take for the ball to reach the ground? Answer

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24. This is a two part question: -How can the average velocity of a moving object be determined from a displacement-time graph? -How can the displacement of a moving object be determined from a velocity-time graph? Answer

25. Game board The SLOPE of the displacement-time graph is equal to the velocity The AREA UNDER THE LINE of a velocity time graph is equal to the displacement

26. A long-boarder has a constant acceleration of 1.5 m·s -2. How long will it take for his velocity to change from 5.0 m·s -1 to 11.0 m·s -1 ? Answer

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28. A plane flies 3000.0 km in 5.000 hours. What is its average velocity in meters per second? Answer

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30. This is a two part question: A runner runs 2 complete 400. m laps on a track in 2.5 min. -What is her average speed (in m/s)? -What is her average velocity (in m/s)? Answer

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32. A hiker walks 1.5 km NE, then turns and walks 2.5 km due north before hiking 6.0 km in a direction 30.0° SW. What is the hiker’s overall displacement from his starting point? Answer

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34. In your own words, what are Newton’s three laws of motion? Answer

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36. A 55.0 kg box is pushed across the floor with a force of 450. N. If there is a frictional force equal to 275 N, with what acceleration will the box move? Answer

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38. A 25.0 kg sign is hung from the ceiling with two cables that each make an angle of 42.0° with the horizontal ceiling. What is the tension in each of the wires? Answer

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40. Give two specific examples of a contact force and two specific examples of a field force (“at-a-distance” force) Answer

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42. A car with an initial velocity of 25.0 m·s -1 comes to a stop in 45.0 m. What is the magnitude of the braking force acting on the car? Answer

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44. What does the area under a Force vs. Time graph represent? Describe what kind of information this value can give us. Answer

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46. A soccer ball (m = 0.430 kg), initially at rest, is kicked and reaches a velocity of 25.0 m/s. If the time that the player’s foot is in contact with the ball is 0.685 s, what average force is exerted by the foot? Answer

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48. A car, m 1 = 1250 kg, is initally at rest. If it is struck from behind by a larger car, m 2 =1550 kg, which is traveling at 15.0 m/s. If the two cars stick together after impact: a)What type of collision is this? b)What is the final velocity of the cars after the collision? Answer

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50. A large safe (m = 725 kg) is lifted to a height of 4.75 m. When it reaches that height, the rope holding it snaps, and the safe falls to the floor. a)How much kinetic energy will it have when it reaches the floor? b)What is the safe’s speed the instant before crashing into the floor? Answer

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52. A ball of clay, m=0.250 kg, is initially at rest when it is struck by an identical ball of clay that is traveling at a speed of 6.50 m/s. How much kinetic energy is lost during the collision if both clay balls stick together upon impact? Answer

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