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Object Interaction and Forces Videos 13 videos

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.

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.

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: 3.5 Object Interaction and Forces 184 Views


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Description:

AP Physics 1: 3.5 Object Interaction and Forces. Which of the following quantities would need to be known in order to calculate the impulse of the collision?

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Transcript

00:00

Thank you We sneak and here's your shmoop du jour

00:05

brought to you by impulse To be clear we're talking

00:08

about impulse in physics not about that sweater We shouldn't

00:11

have bought a wooden block and a rubber wall collide

00:15

which of the following quantities would need to be known

00:19

in order to calculate the impulse of the collision It's

00:23

like two answers right near the options All right well

00:29

in physics impulses the transfer of mo mentum from one

00:32

object to another Think of a game of pool when

00:35

we strike the cue ball with the stick there's a

00:37

transfer of mo mentum like here to here when the

00:40

cue ball strikes another ball well that's another transfer of

00:43

mo mentum each collision is an impulse where the force

00:47

of one object delivers momentum to another object over a

00:50

given period of time Impulses defined his force times the

00:54

change in time equation looks like this because we're good

00:58

physics students way know that force equals mass times acceleration

01:02

right We just know that And since we're great physics

01:05

students problem we know that acceleration equals velocity divided by

01:10

time Write a will overtake Now the force equation can

01:14

live like this force equals mass times the quotient of

01:18

velocity divided by time And while we're having fun with

01:21

equations that means that if we multiply both sides by

01:24

time we'll see that force times time equals mass times

01:27

velocity In other words the impulse of force times time

01:31

equals mo mentum and that means we don't need to

01:34

know the coefficient of friction of the surface The block

01:37

is sliding on and we also don't need to know

01:40

the kinetic energy of the block The options being dear

01:43

incorrect to things We need no r a the mass

01:46

of the block and see the change in its velocity

01:49

That's it way also need to know if the place

01:51

were bought This sweater from takes returns because this thing's 00:01:54.516 --> [endTime] just titties

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