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The physics of free fall, where two balls are thrown with the same initial speed but in opposite directions with negligible air resistance. The concept of gravity, the constant acceleration equations, and how to calculate the initial velocity of an object based on its height and time of flight. Additionally, it touches upon exceptions to free fall caused by friction.
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g^
= 9.8 m/s
2
and is directed downward.
Don’t be fooled by phrases like g-force.
-^
g^
can be used as a unit of acceleration.
The constant accelerationequations apply for
a
g.
The position is now
y
, in the
vertical direction.
0
0
2
^
^
^
^
0 0 0 2 0 2 y
v g v v
v g v
y^
v
t
y
t
v y^0 0
Initialupwardsvelocity
Negative slope =
g
Velocityhere is –
v^0
Friction reduces the total acceleration.
-^
We think about velocity instead of acceleration.