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About the Exam…

About the Exam…. EXAM will begin promptly at 10: 00 am Closed book, closed notes Bring a pencil and calculator Paper will be provided. Study Strategies. Start now! Do lots (and lots) of practice problems Study with a class mate Get enough sleep. Test taking strategies.

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About the Exam…

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  1. About the Exam… • EXAM will begin promptly at 10:00 am • Closed book, closed notes • Bring a pencil and calculator • Paper will be provided

  2. Study Strategies • Start now! • Do lots (and lots) of practice problems • Study with a class mate • Get enough sleep

  3. Test taking strategies • Look through the entire test to see what problems you immediately know how to do and do them first! • Check your numerical answers to see that they do make sense • Make sure your answers include correct units • If you do not know how to do a problem, write down what you do know

  4. Q1 An object goes from one point in space to another. After it arrives at its destination, its displacement is: • either greater than or equal to • always greater than • always equal to • either smaller than or equal to • always smaller than • either smaller or larger than the distance it traveled.

  5. Q2 A marathon runner runs at a steady 15 km/hr. When the runner is 7.5 km from the finish, a bird begins flying from the runner to the finish at 30 km/hr. When the bird reaches the finish line, it turns around and flies back to the runner, and then turns around again, repeating the back-and-forth trips until the runner reaches the finish line. Assuming negligible turn around times, how many kilometers does the bird travel? • 10 km • 15 km • 20 km • 30 km

  6. Q3 The diagram represents the straight line motion of a car. Which of the following statements is true? • The car accelerates, stops, and reverses • The car accelerates at 6 m/s2 for the first 2 s • The car is moving for a total time of 12 s • The car decelerates at 12 m/s2 for the last 4 s • The car returns to its starting point when t = 9s v (m/s) 12 6 t (s) 2 5 9

  7. Q4 A person standing at the edge of a cliff throws one ball straight up and another ball straight down at the same initial speed. Neglecting air resistance, the ball to hit the ground below the cliff with the greater speed is the one initially thrown • Upward. • Downward • Neither-they both hit at the same speed.

  8. Q5 A projectile is shot vertically upward with a given initial velocity. It reaches a maximum height of 100 m. If, on a second shot, the initial velocity is doubled then the projectile will reach a maximum height of: • 70.7 m • 141.4 m • 200 m • 241 m • 400 m

  9. Q6 A baseball is thrown vertically upward into the air. The acceleration of the ball at its highest point is: • 9.8 m/s2 down • 9.8 m/s2 up • changing suddenly from positive to negative • zero • cannot be calculated without knowing the initial velocity

  10. Q7 Consider a person standing in an elevator that is accelerating upward. The upward force exerted by the elevator floor on the person is • larger than • identical to • smaller than the downward weight W of the person.

  11. Q8 A 1000 kg elevator is rising and its speed is increasing at 3 m/s2. The force of the elevator cable on the elevator is: • 6800 N • 1000 N • 3000 N • 9800 N • 12,800 N

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