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Horizontal and Vertical Motion
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Cards (18)
Projectile motion
A form of motion where an object given an
initial velocity
is thrown or projected and is allowed to be acted on by
gravity
in a curved-like path
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Projectiles
Objects
thrown
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Trajectory
Curved
path
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Type 1: Horizontally Launched Projectiles
Projectiles that are launched with an
initial velocity
from an elevated position and follows a
curved-like
path to the ground
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Type 2:
Angle-Launched
Projectiles
Projectiles launched at an angle with respect to the horizontal and rises to a
peak
while moving horizontally. Upon reaching the peak, the projectile falls with a motion that is
symmetrical
to its path upwards to the peak
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Projectile motion examples
A
volleyball
being served
A
baseball
hit by a bat
A flight of a
soccer
ball
Slice serving of the
Ping-Pong
ball
Smashing of
shuttlecock
100m
dash
A
motorbike
taking off on a ramp
Dragonboat
paddling race
Car
racing
Short
course
swimming
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Parabola
Curved
pattern
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The
rider
as it takes off a
cliff
is the projectile in situation A
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The
golf ball
as it flies into the air and returns back to the
ground
is the projectile in situation B
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As the rider takes off from the cliff
Its
downward
vertical velocity is increasing due to the presence of
gravity
which accelerates the rider at 9.8m/s interval downward
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As the golf ball rises in the air
Its vertical velocity
decreases
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When the
golf ball
reaches the maximum height
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When the golf ball returns to the ground
Its vertical velocity will
decrease
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Type I: Horizontally Launched Projectiles
1. The vertical velocity of the marble is gradually
increasing
from points A to D
2. There is no
external net force
acting along the horizontal direction (ax =
0
)
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Type II: Angle-Launched Projectiles
1.
Horizontal
velocity (vx) is still
constant
2. As the projectile ascends (point A to B) the upward, vertical velocity (vy) is
decreasing
3. As the projectile reaches the
maximum
height (point B) it
momentarily
stops causing a vertical velocity equal to zero (vy = 0)
4. When the projectile descends (point B to C), vertical velocity is
increasing
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As the projectile reaches its
highest
peak, the vertical velocity
continuously
increases
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In angle-launched projectile, as the projectile rises its vertical velocity
decreases
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The
acceleration
due to
gravity
is not equal to zero
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