# Shared Flashcard Set

## Details

Lallalaa Projectiles
Projectile and rocketry shenanigans
11
Physics
11/03/2011

Term
 any object that moves through the air or space acted on by gravity alone (and air resistance.)
Definition
 projectile
Term
 a projectile's path
Definition
 Trajectory
Term
 the horizontal distance a projectile will travel
Definition
 range
Term
 Where should the center of mass be located at for a rocket to fly straight up?
Definition
 Toward the front of the rocket
Term
 How does the horizontal component of a projectile’s velocity affect the vertical component of a projectile’s velocity?
Definition
 They do not effect each other
Term
 If I were to throw a ball up into the air, when it reaches the top of it’s path, as it is starting to fall, what would be it’s acceleration?
Definition
 -9.8m/s^2. (the velocity would be zero)
Term
 I launched a projectile horizontally, with a velocity of 5 m/s and it hit the ground in 1 second. If I increased the horizontal velocity to 7 m/s would it hit the ground sooner, at the same time or later. Explain your answer.
Definition
 It would hit at the same time. The horizontal velocity does not affect the vertical motion
Term
 A ball is thrown into the air at an angle of 50 degrees above the horizontal. It lands on a target that is at the same level as where the ball started. What other angle, if any would the ball have to be thrown toward to hit the same target?
Definition
 40 degrees would produce the same horizontal range.
Term
 If a projectile travels 20 meters horizontally in the first second, how far will it move horizontally in the next second?
Definition
 It will move 20 meters during the next second because the horizontal velocity remains constant.
Term
 What launch angle would provide the furthest range? and why
Definition
 45 degrees, the horizontal and vertical components of the velocity would be equal
Term
 Why does the vertical component of a projectile change throughout its flight?
Definition
 Because of the force of gravity.
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