Basics
What is the parabolic path of a projectile called?
Trajectory
What is the acceleration of a projectile along the X-axis?
0 m/s²
What is the acceleration due to gravity?
What formula finds overall velocity from X and Y components?
The Sum of Squares or Pythagorean Theorem
What force accelerates a projectile in freefall?
Gravity
What happens to horizontal velocity during flight?
It stays constant.
What is the Y velocity at the top of the flight path of a projectile?
0 m/s
At the top of the flight path, what is the overall velocity?
Equal to the x-axis velocity.
True or False: Freefall means an object starts moving downward.
EXPLAIN your answer.
False, it moves downwards and sideways simultaneously.
If a ball has an X velocity of 5 m/s at launch, what is its X velocity at landing?
5 m/s
If initial Y velocity is 30 m/s up, what is Y velocity when returning to the same height?
30 m/s down.
Why do we use head-to-tail method for velocity? What does this give you?
To combine components into a resultant vector.
What two components make up 2D projectile motion?
X-axis and Y-axis motion.
Why does X-axis motion remain constant?
There are no forces acting along the x-axis (disregarding air resistance), therefore it remains constant.
How does gravity affect Y-axis motion on the way up?
It slows it down, causing deceleration.
If vx = 5 m/s and vy = 30 m/s, what is the overall speed?
30.4 m/s
Which axis is affected by gravity?
Y-axis.
At the top of the flight path, what is the X-axis velocity?
The x-axis velocity at the top of the flight path is the same as the initial x velocity.
How does gravity affect Y-axis motion on the way down?
It speeds it up, causing acceleration.
What is the angle of overall velocity for vx = 5 m/s and vy = 30 m/s?
80.5° below horizontal.