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HORIZONTALLY LAUNCHED PROJECTILES CONCEPTUAL
QUESTIONS
1.
• The vertical component of the velocity for a horizontally launched projectile increases in the negative direction from launch to landing.
2.
• Both bullets hit the ground at the same time since they fall from the same height and the gravitational acceleration is the same for both.
• ** the horizontal and vertical motions are independent of each other
3.
•Use the Dy = voyt + ½ at2 formula. Voy is 0 m/s for a horizontally launched projectile, and the Dy number should be negative.
4.
• Increasing the height would affect the time in air, final vertical velocity, and the range of the projectile.
5.
• The time will increase since it must cover a larger displacement.
• Since the time increases, it will accelerate longer resulting in a larger final velocity.
• The increase in time will also increase the range of the projectile, x = v t.
6.
• The horizontal velocity is not affected by the vertical displacement. Horizontal velocity is constant and depends only on launch speed.
• The acceleration is due to gravity and is -10 m/s2 for all situations near the Earth’s surface.
7.
• Increasing the initial velocity of a horizontally launched projectile will affect the horizontal velocity and the range only.
8.
• The initial velocity is the horizontal velocity, so an increase would result in a larger horizontal velocity.
• A larger horizontal velocity will create a larger displacement in the x-direction, so range increases.
9.
• The time in the air is only affected by the height of launch.
• The vertical velocity depends on the time in the air, not the initial velocity
•Acceleration is due to gravity.