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CP Projectile Test Answers

CP Projectile Test Answers. 1. Which of the following best represents a graph of horizontal position as a function of time for balls launched horizontally in the positive x direction?. x. t. Constant forward velocity. CP Projectile Test Answers.

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CP Projectile Test Answers

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  1. CP Projectile Test Answers • 1. Which of the following best represents a graph of horizontal position as a function of time for balls launched horizontally in the positive x direction? x t Constant forward velocity

  2. CP Projectile Test Answers • 1. Which of the following best represents a graph of horizontal position as a function of time for balls launched horizontally in the positive x direction? x t Constant forward velocity

  3. CP Projectile Test Answers • 1. Which of the following best represents a graph of horizontal position as a function of time for balls launched horizontally in the positive x direction? x t Constant forward velocity

  4. CP Projectile Test Answers • Which of the following best represents a graph of vertical position as a function of time for balls launched horizontally? y t Increasing downward velocity

  5. CP Projectile Test Answers • Which of the following best represents a graph of vertical position as a function of time for balls launched horizontally? y t Increasing downward velocity

  6. CP Projectile Test Answers • Which of the following best represents a graph of vertical position as a function of time for balls launched horizontally? y t Increasing downward velocity

  7. CP Projectile Test Answers 3. Which of the following graphs best represents the horizontal velocities vs time for balls launched horizontally? 0 m/s Time Constant Forward Velocity

  8. CP Projectile Test Answers 3. Which of the following graphs best represents the horizontal velocities vs time for balls launched horizontally? 0 m/s Time Constant Forward Velocity

  9. CP Projectile Test Answers 3. Which of the following graphs best represents the horizontal velocities vs time for balls launched horizontally? 0 m/s Time Constant Forward Velocity

  10. CP Projectile Test Answers 4. Which of the following graphs best represents the vertical velocities vs time for balls launched horizontally? 0 m/s Time Increasing downward velocity

  11. CP Projectile Test Answers 4. Which of the following graphs best represents the vertical velocities vs time for balls launched horizontally? 0 m/s Time Increasing downward velocity

  12. CP Projectile Test Answers 4. Which of the following graphs best represents the vertical velocities vs time for balls launched horizontally? 0 m/s Time Increasing downward velocity

  13. CP Projectile Test Answers 5. Which of the following graphs best represents the horizontal acceleration vs time for balls launched horizontally? 0 m/s2 Time Constant forward Velocity

  14. CP Projectile Test Answers 5. Which of the following graphs best represents the horizontal acceleration vs time for balls launched horizontally? 0 m/s2 Time Constant forward Velocity

  15. CP Projectile Test Answers 5. Which of the following graphs best represents the horizontal acceleration vs time for balls launched horizontally? 0 m/s2 Time Constant forward Velocity

  16. CP Projectile Test Answers 6. Which of the following graphs best represents the vertical acceleration vs time for balls launched horizontally? 0 m/s2 Time Constant downward acceleration equal to 9.8 m/s2

  17. CP Projectile Test Answers 6. Which of the following graphs best represents the vertical acceleration vs time for balls launched horizontally? 0 m/s2 Time Constant downward acceleration equal to 9.8 m/s2

  18. CP Projectile Test Answers 6. Which of the following graphs best represents the vertical acceleration vs time for balls launched horizontally? 0 m/s2 Time Constant downward acceleration equal to 9.8 m/s2

  19. CP Projectile Test Answers • 7. An Olympic athlete throws a javelin at five different angles above the horizontal, each with thesame speed: 20o 30 o 50 o 600 70 o Which two throws cause the javelin to land the same distanceaway? • a)      20 o and 70 o • b)      30 o and 60 o • c)      20 o and 50 o • d)      50 o and 70 o • 8. Why? Projectiles fired at complementary angles produce the same horizontal range – check projectile lab 2 results.

  20. CP Projectile Test Answers • 7. An Olympic athlete throws a javelin at five different angles above the horizontal, each with thesame speed: 20o 30 o 50 o 600 70 o Which two throws cause the javelin to land the same distanceaway? • a)      20 o and 70 o • b)      30 o and 60 o • c)      20 o and 50 o • d)      50 o and 70 o • 8. Why? Projectiles fired at complementary angles produce the same horizontal range – check projectile lab 2 results.

  21. CP Projectile Test Answers • 7. An Olympic athlete throws a javelin at five different angles above the horizontal, each with thesame speed: 20o 30 o 50 o 600 70 o Which two throws cause the javelin to land the same distanceaway? • a)      20 o and 70 o • b)      30 o and 60 o • c)      20 o and 50 o • d)      50 o and 70 o • 8. Why? Projectiles fired at complementary angles produce the same horizontal range – check projectile lab 2 results.

  22. CP Projectile Test Answers • 9. A projectile is fired at 30 degrees above the horizon. Which statement is true of the • y – component of its velocity • a) it is greater than the x component of its velocity • b) it is less than the x component of its velocity • c) it is equal to the x component of its velocity • d) its y component of its velocity is -9.8 m/s2 • 10. Why – Any launch angle less than 45o produces greater initial horizontal launch velocities. • Any launch angle greater than 45o produces greater vertical launch velocities.

  23. CP Projectile Test Answers • 9. A projectile is fired at 30 degrees above the horizon. Which statement is true of the • y – component of its velocity • a) it is greater than the x component of its velocity • b) it is less than the x component of its velocity • c) it is equal to the x component of its velocity • d) its y component of its velocity is -9.8 m/s2 • 10. Why – Any launch angle less than 45o produces greater initial horizontal launch velocities. • Any launch angle greater than 45o produces greater vertical launch velocities.

  24. CP Projectile Test Answers • 9. A projectile is fired at 30 degrees above the horizon. Which statement is true of the • y – component of its velocity • a) it is greater than the x component of its velocity • b) it is less than the x component of its velocity • c) it is equal to the x component of its velocity • d) its y component of its velocity is -9.8 m/s2 • 10. Why – Any launch angle less than 45o produces greater initial horizontal launch velocities. • Any launch angle greater than 45o produces greater vertical launch velocities.

  25. CP Projectile Test Answers 11. Which of the following will have the greatest time of flight when fired from the • ground to the ground? • a) A projectile fired at 100 m/s at 25o degrees • b) A projectile fired at 100 m/s at 35o degrees • c) A projectile fired at 100 m/s at 45o degrees • d) A projectile fired at 100 m/s at 55o degrees 12. Why? The higher the launch angle the longer the time of flight.The higher the launch angle the longer it takes the projectile to achievezero vertical velocity at the projectiles maximum height

  26. CP Projectile Test Answers 11. Which of the following will have the greatest time of flight when fired from the • ground to the ground? • a) A projectile fired at 100 m/s at 25o degrees • b) A projectile fired at 100 m/s at 35o degrees • c) A projectile fired at 100 m/s at 45o degrees • d) A projectile fired at 100 m/s at 55o degrees 12. Why? The higher the launch angle the longer the time of flight.The higher the launch angle the longer it takes the projectile to achievezero vertical velocity at the projectiles maximum height

  27. CP Projectile Test Answers • 13. Which of the following will travel the greatest horizontal distance when fired from the • ground to the ground? • a) A projectile fired at 100 m/s at 10o degrees • b) A projectile fired at 100 m/s at 20o degrees • c) A projectile fired at 100 m/s at 50o degrees • d) A projectile fired at 100 m/s at 70o degrees • e) A projectile fired at 100 m/s at 80o degrees • 14. Why? A 45 degree launch angle results in the greatest horizontal distance. A 500 launch angle is the closest to 450 of the choices listed.

  28. CP Projectile Test Answers • 13. Which of the following will travel the greatest horizontal distance when fired from the • ground to the ground? • a) A projectile fired at 100 m/s at 10o degrees • b) A projectile fired at 100 m/s at 20o degrees • c) A projectile fired at 100 m/s at 50o degrees • d) A projectile fired at 100 m/s at 70o degrees • e) A projectile fired at 100 m/s at 80o degrees • 14. Why? A 45 degree launch angle results in the greatest horizontal distance. A 500 launch angle is the closest to 450 of the choices listed.

  29. CP Projectile Test Answers • 13. Which of the following will travel the greatest horizontal distance when fired from the • ground to the ground? • a) A projectile fired at 100 m/s at 10o degrees • b) A projectile fired at 100 m/s at 20o degrees • c) A projectile fired at 100 m/s at 50o degrees • d) A projectile fired at 100 m/s at 70o degrees • e) A projectile fired at 100 m/s at 80o degrees • 14. Why? A 45 degree launch angle results in the greatest horizontal distance. A 500 launch angle is the closest to 450 of the choices listed.

  30. CP Projectile Test Answers 15. A projectile is fired at 45 degrees above the horizon. Which statement is true of the y – component of its acceleration • the y – component of its acceleration at its maximum height is 0 m/s2 b) the y – component of its acceleration initially is 9.8 m/s2 sin 450 • the y – component of its acceleration initially is -9.8 m/s2 sin 450 d) the y – component of its acceleration at its maximum height is -9.8 m/s2 16. Why? The y – component of the acceleration due to gravity is a constant -9.8m/s2 regardlessof the y position of the projectile. It is -9.8m/s2 on a projectiles way up, at itsmaximum height and on its way down.

  31. CP Projectile Test Answers 15. A projectile is fired at 45 degrees above the horizon. Which statement is true of the y – component of its acceleration • the y – component of its acceleration at its maximum height is 0 m/s2 b) the y – component of its acceleration initially is 9.8 m/s2 sin 450 • the y – component of its acceleration initially is -9.8 m/s2 sin 450 d) the y – component of its acceleration at its maximum height is -9.8 m/s2 16. Why? The y – component of the acceleration due to gravity is a constant -9.8m/s2 regardlessof the y position of the projectile. It is -9.8m/s2 on a projectiles way up, at itsmaximum height and on its way down.

  32. CP Projectile Test Answers 15. A projectile is fired at 45 degrees above the horizon. Which statement is true of the y – component of its acceleration • the y – component of its acceleration at its maximum height is 0 m/s2 b) the y – component of its acceleration initially is 9.8 m/s2 sin 450 • the y – component of its acceleration initially is -9.8 m/s2 sin 450 d) the y – component of its acceleration at its maximum height is -9.8 m/s2 16. Why? The y – component of the acceleration due to gravity is a constant -9.8m/s2 regardlessof the y position of the projectile. It is -9.8m/s2 on a projectiles way up, at itsmaximum height and on its way down.

  33. CP Projectile Test Answers • 17 . You are throwing a ball for the second time. If the ball leaves your hand with twice the velocity • it had on your first throw, its time of flight will be • 1.4 times as much. • half as much. • twice as much. vfy=viy + gt t=vfy-viyt related to vi g d) Four times as much e. the same

  34. CP Projectile Test Answers • 17 . You are throwing a ball for the second time. If the ball leaves your hand with twice the velocity • it had on your first throw, its time of flight will be • 1.4 times as much. • half as much. • twice as much. vfy=viy + gt t=vfy-viyt related to vi g d) Four times as much e. the same

  35. CP Projectile Test Answers • 17 . You are throwing a ball for the second time. If the ball leaves your hand with twice the velocity • it had on your first throw, its time of flight will be • 1.4 times as much. • half as much. • twice as much. vfy=viy + gt t=vfy-viyt related to vi g d) Four times as much e. the same

  36. CP Projectile Test Answers • 17 . You are throwing a ball for the second time. If the ball leaves your hand with twice the velocity • it had on your first throw, its time of flight will be • 1.4 times as much. • half as much. • twice as much. vfy=viy + gt t=vfy-viyt related to vi g d) Four times as much e. the same

  37. CP Projectile Test Answers • 17 . You are throwing a ball for the second time. If the ball leaves your hand with twice the velocity • it had on your first throw, its time of flight will be • 1.4 times as much. • half as much. • twice as much. vfy=viy + gt t=vfy-viyt related to vi g d) Four times as much e. the same

  38. CP Projectile Test Answers • 18. You are throwing a ball for the second time. If the ball leaves your hand with twice the velocity it had on your first throw, the maximum height it will achieve is  a. 1.4 times as much. b. half as much. c. twice as much. d. four times as much The ball will be in the air for twice as long and it will travel twice as fast initially. twice the time at twice the speed. e. the same

  39. CP Projectile Test Answers • 18. You are throwing a ball for the second time. If the ball leaves your hand with twice the velocity it had on your first throw, the maximum height it will achieve is  a. 1.4 times as much. b. half as much. c. twice as much. d. four times as much The ball will be in the air for twice as long and it will travel twice as fast initially. twice the time at twice the speed. e. the same

  40. CP Projectile Test Answers 19. You are throwing a ball for the second time. If the ball leaves your hand with twice the velocity • it had on your first throw, the vertical velocity at the maximum height will be  a. 1.4 times as much. b. half as much. c. twice as much. d. four times as much e. the same – All projectiles at their maximum height will have a vertical velocity of 0 m/s

  41. CP Projectile Test Answers 19. You are throwing a ball for the second time. If the ball leaves your hand with twice the velocity • it had on your first throw, the vertical velocity at the maximum height will be  a. 1.4 times as much. b. half as much. c. twice as much. d. four times as much e. the same – All projectiles at their maximum height will have a vertical velocity of 0 m/s

  42. CP Projectile Test Answers 19. You are throwing a ball for the second time. If the ball leaves your hand with twice the velocity • it had on your first throw, the vertical velocity at the maximum height will be  a. 1.4 times as much. b. half as much. c. twice as much. d. four times as much e. the same – All projectiles at their maximum height will have a vertical velocity of 0 m/s

  43. CP Projectile Test Answers • 20. Projectiles that are fired down at 10 degrees below the horizon will have • a higher y velocity when they hit the ground when compared to projectile fired up at 10 degrees above the horizon at the same speed • a lower y velocity when they hit the ground when compared to a projectile fired up at 10 degrees above the horizon at the same speed c) the same y velocity when they hit the ground when compared to a projectile fired up at 10 degrees above the horizon at the same speed. d) have a velocity that could be higher or lower when compared to a projectile fired up at 10 degrees above the horizon depending on the whether the initial velocities are above 10 m/s or below 10 m/s.

  44. CP Projectile Test Answers • 20. Projectiles that are fired down at 10 degrees below the horizon will have • a higher y velocity when they hit the ground when compared to projectile fired up at 10 degrees above the horizon at the same speed • a lower y velocity when they hit the ground when compared to a projectile fired up at 10 degrees above the horizon at the same speed c) the same y velocity when they hit the ground when compared to a projectile fired up at 10 degrees above the horizon at the same speed. d) have a velocity that could be higher or lower when compared to a projectile fired up at 10 degrees above the horizon depending on the whether the initial velocities are above 10 m/s or below 10 m/s.

  45. CP Projectile Test Answers • The projectile fired up at 10 m/s 10o above the horizon will eventually become a 10 m/s projectile fired down Fired up becomes Fired down. Fired down

  46. CP Projectile Test Answers • The projectile fired up at 10 m/s 10o above the horizon will eventually become a 10 m/s projectile fired down Fired up becomes Fired down. Fired down

  47. CP Projectile Test Answers • The projectile fired up at 10 m/s 10o above the horizon will eventually become a 10 m/s projectile fired down Fired up becomes Fired down. Fired down

  48. Projectile Test-time of flight for yi=1.20m and yf=0ma) What is the time of flight of the dropped ball? • Given Find FRS • g= - 9.8 m/s2 t=?s yf = yi + viyt + ½ gt2 • viy=0m/s yf = yi + ½ gt2 • yi=1.20 m yf - yi = ½ gt2 • yf=0m yf - yi = t2 • ½ g • yf - yi = t = 0m-1.20m • ½ g ½ (-9.8m/s2) • t = .49s

  49. Projectile Test-time of flight for yi=1.20m and yf=0ma) What is the time of flight of the dropped ball? • Given Find FRS • g= - 9.8 m/s2 t=?s yf = yi + viyt + ½ gt2 • viy=0m/s yf = yi + ½ gt2 • yi=1.20 m yf - yi = ½ gt2 • yf=0m yf - yi = t2 • ½ g • yf - yi = t = 0m-1.20m • ½ g ½ (-9.8m/s2) • t = .49s

  50. Projectile Test-time of flight for yi=1.20m and yf=0ma) What is the time of flight of the dropped ball? • Given Find FRS • g= - 9.8 m/s2 t=?s yf = yi + viyt + ½ gt2 • viy=0m/s yf = yi + ½ gt2 • yi=1.20 m yf - yi = ½ gt2 • yf=0m yf - yi = t2 • ½ g • yf - yi = t = 0m-1.20m • ½ g ½ (-9.8m/s2) • t = .49s

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