Multiple Choice
In ideal projectile motion on level ground (ignore air resistance), a firearm fires a projectile with fixed speed from ground level. Which statement about the projectile’s maximum horizontal range is true?
5. Projectile Motion
Intro to Projectile Motion: Horizontal Launch
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Which of the following quantities are constant during projectile motion?
A
Vertical acceleration & vertical velocity
B
Angle (direction) of the velocity vector
C
Horizontal acceleration & vertical velocity
D
Vertical acceleration & horizontal velocity
Verified step by step guidance1
Understand that projectile motion is a type of motion experienced by an object that is launched into the air and is subject to only the acceleration due to gravity.
Recognize that in projectile motion, the only force acting on the object is gravity, which acts downward, causing a constant vertical acceleration.
Identify that the vertical acceleration is constant and equal to the acceleration due to gravity, typically denoted as \( g \) and approximately \( 9.81 \, \text{m/s}^2 \) downward.
Note that there is no horizontal force acting on the projectile (assuming air resistance is negligible), which means the horizontal acceleration is zero, resulting in a constant horizontal velocity.
Conclude that during projectile motion, the vertical acceleration remains constant due to gravity, and the horizontal velocity remains constant due to the absence of horizontal forces.
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Intro to Projectile Motion: Horizontal Launch practice set
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