# An apple falling from a tree. . by 2tG08pX

VIEWS: 0 PAGES: 9

• pg 1
```									An apple falling from a tree. . .
Does it accelerate while falling?

How do you know?

What causes the apple to accelerate as it
fall?

What is gravity?
Free fall

What is free fall?

What does it mean when we say an object
is free-falling?

What is the acceleration of an object free-
falling?
Instantaneous Velocity (when free-falling)
Time falling Velocity (m/s)
(s)
0
1
2
3
4
5
…
50
A ball is tossed upwards with an initial velocity of 30 m/s. For each position, find
the instantaneous velocity and acceleration of the ball for every second.
Distance traveled (when free-falling)

Time falling (s)            Distance (m)

0
1
2
3
4
5
…
50
Tennis Ball Free Falling
Objects in free fall…
 Are always accelerating at a constant rate of
________________.
When dropped, it accelerates at ________________ at
ALL times.
 When tossed upwards, it accelerates by
_____________ at ALL times, even at the top of its path
when the instantaneous velocity is
____________.

 Increases or decreases its speed in
increments of ________________ each second.

 Falls at ________________ distances every
second of free-fall.
 Which object - the elephant
or the feather - will hit the
ground first?

Why?
True or False
 The elephant has a smaller force of air resistance than
the feather and therefore falls faster.
 The elephant has a greater acceleration of gravity than
the feather and therefore falls faster.
 Both elephant and feather have the same acceleration of
gravity, yet the feather experiences a greater air
resistance.
 Each object experiences the same amount of air
resistance, yet the elephant experiences the greatest
acceleration of gravity.
 The elephant experiences less air resistance and than
the feather and thus reaches a larger terminal velocity.
 The feather experiences more air resistance than the
elephant and thus reaches a smaller terminal velocity.
Objects Falling in Vacuum

featherdrop_sound.mov

```
To top