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Projectile mail

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a glimpse of projectile motion

a glimpse of projectile motion

Published in Education , Technology , Sports
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Transcript

  • 1.  
  • 2.
    • Any object that moves through the air or space
  • 3.
    • Let’s think about objects that move in a straight line…
  • 4.
    • If there were no gravity, an object moving horizontally (in the x-direction) would continue to move _________________
    in a straight line
  • 5.
    • If an object is dropped vertically (in the y-direction), then _________ causes it to _______________ downwards
    gravity accelerate
  • 6.
    • Projectile motion is a ________________ !
    • In the x-direction, it continues to move at a __________ speed, but in the y-direction, it ___________downwards because of gravity!
    combination constant accelerate
  • 7.
    • For a projectile: THE X-VELOCITY IS _________________ OF THE Y-VELOCITY!!!
    • The speed in the x-direction doesn’t care what the speed in the y-direction is!
    INDEPENDENT
  • 8.
    • Remember that _____________ is only pulling in one direction ( __________ !) and nothing is pulling ________________
    • If there were no gravity, a projectile would go _____________forever:
    gravity down right or left straight
  • 9.
    • Remember that velocity has a ____________ , so it can be represented using ____________ !
    • We can break down the velocity into separate x- and y- components:
    direction vectors
  • 10.
    • Let’s examine the x and y velocity vectors for a projectile:
    • Its x-velocity stays __________and its y-velocity _____________.
    constant increases
  • 11.
    • X- Component
    • Y- Component
    • Vectors
    Note: g= 9.8 m/s^2
  • 12.  
  • 13.
    • Just like in free-fall:
      • Velocity in the y-direction ___________ on the way up, and ____________ on the way down
      • At the top of the path, the y-velocity is always ______
      • Velocity on the way up ________velocity on the way down when you reach the same _________
    decreases increases zero equals height
  • 14.
    • If you were walking at a constant velocity with a baseball and threw it up into the air while you were walking, would it fall
      • A. in front of you
      • B. behind you
      • C. right back into your hands?
    • Why??
  • 15.
    • Its y-velocity is different than yours, but its x-velocity stays the same as you. It should land back into your hands!
  • 16.
    • An airplane is carrying a bomb and traveling with a velocity of 1,100 mph east. If it releases its bomb and continues at that velocity, will the bomb land:
      • A. Directly underneath the plane
      • B. Behind the plane
      • C. Ahead of the plane
  • 17.
    • If they’re going at the same x-velocity, it will land directly beneath the plane!
  • 18.
    • Suppose two balls released from the same height: one is dropped from rest, and the other is thrown horizontally. Which will hit the ground first? Why?
    • They will hit at the same time, because they are both being pulled by gravity at the same rate! Only one will have a greater x-range.
  • 19.
    • Your x- distance is called your __________and your y-distance is called your __________ .
    • Your range and height depend on:
      • The _______ that the projectile is launched at and
      • The __________it is launched at
    range height angle velocity
  • 20.
    • Increasing your angle increases your range until you reach 45 °.
    • 45° to 90°, increasing your angle decreases your range.
  • 21.
    • The greater the initial velocity of a projectile, the ____________it will go:
    farther
  • 22.
    • An object is fired from the ground at 100 meters per second at an angle of 30 degrees with the horizontal
      • Calculate the horizontal and vertical components of the initial velocity
      • After 2.0 seconds, how far has the object traveled in the horizontal direction?
      • How high is the object at this point?
  • 23.
    • Part a
    • Part b
    • Part c
  • 24. Earth
  • 25. Earth Small horizontal velocity
  • 26. Earth Medium horizontal velocity
  • 27. Earth Fast horizontal velocity
  • 28. A projectile is always falling. The faster it moves horizontally, the farther away it will be when it hits the ground. Slow Medium Fast