Name the Variable
-9.8 m/s^2
Acceleration
When a projectile is launched at an angle, what two components does the initial velocity have?
Vertical and Horizontal
In the absence of gravity, a cannonball would continue its horizontal motion at a _____ velocity.
Constant
An object is launched horizontally off of a 8 m table. What is the time it takes to hit the ground?
t=1.76 s
A projectile launched from the ground at an angle will follow a path that is in the shape of a
Parabola
This variable will always be positive
Time
Vertical acceleration
9.8 m/s^2 downward
Horizontal motion of a projectile is _______ of its vertical motion.
Independent
A cannonball is launched horizontally 15 m at a speed of 18 m/s. What time does it reach the ground?
t=0.83 s
Maximum range for a launch?
45°
Common variable between the horizontal and vertical motion.
Time
Horizontal acceleration
Zero
What equation is used to find the time of a ball horizontally kicked x meters.
ΔX=½ aΔt^2
A student shoots a pencil 130 m/s horizontally, before striking the ground 5 s later. How far did the pencil go?
ΔX= 650 m
If the initial speed of a projectile is doubled, its range will
Quadruple.
If positive, this variable ends while moving up. But if negative, ends while moving down.
Final velocity
These angles are typically 90° or less.
Launch angle
Horizontal Range
Distance along the horizontal plane an object travels before reaching the same vertical position as it started from.
An orange is rolled at 9 m/s from a bridge 120 m high. How far from the base of the bridge will the orange hit the ground.
ΔX= 96.56 m
The path of an object thrown through the air
Trajectory
A projectile fired horizontally has a ________ ________ _______of zero.
Vertical initial velocity
If an object is launched upward, it rises with slowing speed reaches the top of its path where it is momentarily ____, and descends with increasing speed.
Zero
Imagine kicking a rock off of a cliff. What velocity is present, what isn’t?
Initial horizontal velocity is present, initial vertical velocity is not.
A bullet fired horizontally from the top of the cliff at a speed of 22 m/s lands 206 m away. How high was the cliff, where the bullet was fired from?
ΔY= 45.864 m
The x component of a given vector is equal to that vector's magnitude multiplied by the ______ ____ __ with respect to the angle between the vector and the x axis
The cosine of x