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Playlist AP® Physics 1: Object Interaction and Forces 13 videos

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AP Physics 1: 1.1 Object Interaction and Forces
258 Views

If there's one good thing about the heat death of the universe, it's that we'll all have an excellent excuse for dodging physics homework.

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AP Physics 1: 1.2 Object Interaction and Forces
213 Views

The real moral of the story here is just "don't get in the way of elephants or tigers." That is not the kind of kinetic energy you want to absorb.

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AP Physics 1: 1.3 Object Interaction and Forces
236 Views

Hi there. We'd like to wave hello to you, but the internet isn't letting us. So instead, accept this fun question about waves and physics! It's alm...

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AP Physics 1: 3.2 Object Interaction and Forces 189 Views


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Description:

Put some spring in your step with this shmoopy AP Physics question! ....Bet you have  no  idea that this question is going to be about springs...

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Transcript

00:00

Thank you We sneak and here's your shmoop too sure

00:05

brought to you by basketball tryouts We were all set

00:08

to make the best ball team until they told us

00:10

our springy shoes were their words against the rules All

00:14

right What is the restoring force on a spring with

00:17

a spring constant of five newtons per meter that has

00:19

stretched toe four meters and hear the potential answers dinner

00:24

All right well the answer this question We need to

00:26

be familiar with hooks law which is stay away from

00:29

hungry crocodiles Wait That's captain hook's a lot of different

00:32

things Books lot tells us that the restoring force of

00:35

a spring is equal to its constant times its displacement

00:40

or how much it stretched Any equation k is the

00:43

spring constant and x is displacement Since the spring constant

00:48

is reacting against a force hey is expressed as a

00:51

negative number Well luckily for us his question is crazy

00:54

generous and gives us both of the numbers we need

00:57

to solve it So in this case the force equals

00:59

negative five newtons per meter times four meters giving us

01:02

an answer of negative twenty newtons making the correct answer

01:05

Option d you can also use hooks a lot of

01:08

fine the restoring force of a compressed spring The formula

01:11

would be the same but since the spring is compressed

01:15

the displacement would be expressed as a negative number And

01:18

since both the spring constant and the displacement would be

01:21

negative the resulting force would be a positive number So

01:25

with this knowledge hopefully we can perfect are springy shoes

01:28

because well it turns out we're still having some issues

01:30

with

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