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Projectile Motion

Quiz by Becky Helmer

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12 questions
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  • Q1
    Vertical acceleration is always equal to
    initial vertical velocity
    9.8 m/s2
    0 m/s2
    initial velocity
    60s
  • Q2
    Horizontal acceleration is always equal to
    initial horizontal velocity
    0 m/s2
    9.8 m/s2
    initial velocity
    60s
  • Q3
    When is the vertical velocity of a projectile the smallest?
    right after it leaves the ground
    at the maximum height
    right before it hits the ground
    60s
  • Q4
    The initial horizontal velocity of a projectile is 12.5 m/s. What is the horizontal velocity just before the projectile hits the ground?
    12.5 m/s
    25 m/s
    50 m/s
    0 m/s
    60s
  • Q5
    A baseball is thrown with an initial velocity of 14 m/s and is in the air for 2 seconds. Which of the following is constant while the baseball is in the air?
    acceleration
    position
    velocity
    displacement
    60s
  • Q6
    A rock is kicked horizontally off of a bridge with an initial velocity of 20 m/s and is in the air for 2 seconds. What is the horizontal velocity of the ball just before it strikes the ground?
    10 m/s
    40 m/s
    0 m/s
    20 m/s
    60s
  • Q7
    A rock is thrown at  horizontally 7 m/s and it remains in the air for 4 seconds. Which equation do you use to find the horizonal displacement?
    Vfy = Viy + at
    y = 0.5gt2
    x = Vx times t
    60s
  • Q8
    A rock is thrown horizontally at 15 m/s and is in the air for 3.5 seconds. Which equation do you use to find horizontal displacement?
    x = Vx times t
    y = 0.5gt2
    60s
  • Q9
    Angie walks 5 miles east, then turns and walks 2 miles west. What is her distance walked?
    3 miles
    7 miles
    10 miles
    2.5 miles
    60s
  • Q10
    Angie walks 5 miles east, then turns and walks 2 miles west. What is her displacement?
    5.4 miles
    29 miles
    7 miles
    3 miles
    60s
  • Q11

    Rock A is thrown horizontally off of a cliff with a velocity of 20 m/s. The rock lands 60 m from the base of the cliff.  A second rock (Rock B) is dropped from the same height from which Rock A was thrown. If both rocks are released simultaneously, which rock will strike the ground first?

    They will strike the ground at the same time.

    Rock B

    Rock A

    30s
  • Q12

    A marble is kicked horizontally off of a 35.75 m high roof at 10 m/s .  Which equation do you use to figure out the time?

    x = Vx times t

    y = .5gt2

    30s

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