AP Physics 1: 3.4 Properties of Objects and Systems

AP Physics 1: 3.4 Properties of Objects and Systems. Which object experiences the greatest acceleration?

AP Physics 1Properties of Objects and Systems
LanguageEnglish Language
Science Practice 7Relating knowledge across scales, concepts, and representations

Transcript

00:26

(Mumbles)

00:28

All right, let's imagine what would actually happen

00:31

in this situation we'd probably begin climbing to the top of the Empire State [Man climbing up huge staircase]

00:36

Building and well on second thought we'd take the elevator (laughs)

00:40

Come on we're carrying a bowling ball here people. Plus it's like a bajillion flights of stairs.

00:44

Anyway at the top we'd go to the observation deck and pull the bowling

00:48

ball the marble and the feather out of the bag, we look around and make sure

00:52

there's no security around... don't forget that and then we'd give them a shove.

00:56

Now what would happen well the marble and the bowling ball would drop right away, the [Marble and bowling ball have already landed and the feather is floating down]

01:01

feather well it won't be going quite so fast. But that's not because gravity is

01:05

slower for the feather after all gravity is a constant the reason the feather

01:10

falls slower than the bowling ball or the marble is because the feathers shape

01:15

and mass make it more susceptible to air resistance like its densities different.

01:20

As all of these objects fall gravity is pulling them down and the air is pushing

01:25

back against them, but in a vacuum chamber with no air at all, all three of

01:30

these things will fall at the exact same rate. Now the bowling ball is definitely [Objects are dropped in a vacuum chamber]

01:34

falling with more force which will be obvious when it hits the ground, splat..

01:38

But the acceleration they all experience is the same: 9.8 meters per second squared

01:43

here on earth that's the acceleration of gravity for feathers, for bowling balls

01:48

and for everything else. So the correct answer here is D the acceleration is equal

01:53

for all of the objects and we don't have to worry about air resistance in a

01:57

vacuum. Oh and please remember that whole dropping things from the top of the [Police have the man in handcuffs]

02:02

Empire State Building scenario was just to show how things work, we shouldn't go

02:07

around dropping things off of building even if it's for science... [Bowling ball lands on securities head]