ASVAB Physical Science 4.2

ASVAB Physical Science 4.2. Which law is this situation an example of?

ASVABASVAB Physical Science
Mechanical Comprehension
ASVAB SciencePhysical Science
LanguageEnglish Language
Test PrepASVAB

Transcript

00:23

this is an example of what and here are the potential answers....

00:28

....all right you probably heard of Isaac

00:32

Newton this guy old British scientist an apple fell on his head discovered

00:36

gravity sure we're simplifying it a lot but he was one of the most influential

00:40

scientists ever come on Al, we love you too well in 1687 Newton came up with

00:46

the three laws of motion never knowing that one day they'd be the

00:49

star of a shmoop video oh we're sure he'd be thrilled let's start out by

00:53

crossing off B the second law from our list his second law basically states

00:58

that force equals mass times acceleration F equals MA so if you have

01:03

a moving object and it picks up speed it's forces increase and it also means that [Shopping cart moves along]

01:09

if you have a moving object and you increase its mass more force is required

01:13

to move it which just makes sense but sometimes you need a scientist to prove

01:16

these kind of things.. so while our bowling ball was demonstrating the second law our [Bowlin pins move around]

01:21

stationary bowling pins were not we can get rid of B what about C third

01:25

laws well it states that every action has an equal and opposite reaction for

01:30

an ordinary everyday example of this we can think of a jetpack when we strap our [Man wearing a jetpack]

01:35

jetpack on and hit the ignition switch the jet engine pushes hot gas downwards [Man rises into air with jetpack]

01:40

because there's a powerful downward force there's an equally powerful upward force

01:44

and that's how we get to the grocery store yes pretty nifty but still

01:49

doesn't clarify why our hands are standing still so we'll keep looking.. maybe

01:52

it's option D the law of directionality well the thing is there is no such law [Boy appears beside lots of arrows]

01:56

it just sounded really cool right well the correct answer here is A his first

02:01

law basically states that an object at rest tends to stay at rest and an object

02:05

in motion tends to stay in motion unless an outside force acts on it in an

02:11

example well look at some of Saturday morning we're not moving from our [Man dragged from bed]

02:15

bed until mom exerts a force on us another example of this is our bowling

02:19

pins it's going to stand there forever until a ball comes and runs into them making [Bowling pins struck down by ball]

02:23

em move..these laws are pretty intuitive but sometimes it takes a genius to prove

02:27

this kind of stuff so we're grateful to good old Isaac Newton for doing all the hard

02:30

work and we're also grateful to good old Fig Newton for making yummy cookies wait

02:35

his name was Fig, right?