# Horizontally Launched Projectiles Conceptual Questions · PDF file 2014. 9. 5. ·...

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### Transcript of Horizontally Launched Projectiles Conceptual Questions · PDF file 2014. 9. 5. ·...

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 at 2 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.

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