Lesson 2: Projectile Motion

20 Questions | Total Attempts: 1213

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Lesson 2: Projectile Motion

Questions and Answers
  • 1. 
    • A. 

      True

    • B. 

      False

  • 2. 
    In the equations below, the vertical acceleration of a projectile is known to be 9.8m/s/s(the acceleration of gravity).
    • A. 

      True

    • B. 

      False

  • 3. 
    An object upon which the only force acting is gravity.
  • 4. 
    A cannonball is launched horizontally from the top of an 78.4-meter high cliff. How much time will it take for the ball to reach the ground and at what height will the ball be after each second of travel?
  • 5. 
    Anna Litical drops a ball from rest from the top of 78.4-meter high cliff. How much time will it take for the ball to reach the ground and at what height will the ball be after each second of motion?
  • 6. 
    Gravity acts to influence the vertical motion of the projectile, thus causing a vertical acceleration.
    • A. 

      True

    • B. 

      False

  • 7. 
    An object dropped from rest is not a projectile (provided that the influence of air resistance is negligible). 
    • A. 

      True

    • B. 

      False

  • 8. 
    An object that is thrown vertically upward is also a projectile (provided that the influence of air resistance is negligible).
    • A. 

      True

    • B. 

      False

  • 9. 
    An object which is thrown upward at an angle to the horizontal is also a projectile (provided that the influence of air resistance is negligible).
    • A. 

      True

    • B. 

      False

  • 10. 
    A projectile is any object that once projected or dropped continues in motion by its own __________ and is influenced only by the downward force of __________ .
    • A. 

      Inertia,Gravity

    • B. 

      Mass,Frictional Force

    • C. 

      Inertia,Frictional Force

    • D. 

      None of the above.

  • 11. 
    Horizontal forces are not required to keep a projectile moving horizontally.
    • A. 

      True

    • B. 

      False

  • 12. 
    The horizontal velocity of a projectile can be changed.
    • A. 

      True

    • B. 

      False

  • 13. 
    The horizontal motion of a projectile is independent of its vertical motion.
    • A. 

      True

    • B. 

      False

  • 14. 
    Projectiles travel with a parabolic trajectory due to the influence of inertia.
    • A. 

      True

    • B. 

      False

  • 15. 
    Y = 0.5 • g • t2  is equation for vertical displacement for a horizontally launched projectile
    • A. 

      True

    • B. 

      False

  • 16. 
    The method of taking a single vector at an angle and separating it into two perpendicular parts. The two parts of a vector are known as components and describe the influence of that vector in a single direction.
  • 17. 
    The initial x-velocity (vix) can be found using the equation vix = vi•cosine(Theta) where Theta is the angle that the velocity vector makes with the horizontal.
    • A. 

      True

    • B. 

      False

  • 18. 
    The initial y-velocity (viy) can be found using the equation viy = vi•sine(Theta) where Theta is the angle that the velocity vector makes with the horizontal.
    • A. 

      True

    • B. 

      False

  • 19. 
    If the horizontal velocity of a projectile is constant; there is no horizontal acceleration.
    • A. 

      True

    • B. 

      False

  • 20. 
    The horizontal displacement of a projectile is dependent upon the horizontal component of the initial velocity.
    • A. 

      True

    • B. 

      False

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