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System Interactions and Changes Videos 15 videos

AP Physics 1: 1.1 System Interactions and Changes
196 Views

We wouldn't give away the answer to this AP Physics question, not for all the joules in the crown. Come back when you've got some actual jewels. Th...

AP Physics 1: 1.2 System Interactions and Changes
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AP Physics 1: 1.2 System Interactions and Changes. What is the total mechanical energy of the system?

AP Physics 1: 1.4 System Interactions and Changes
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AP Physics 1: 1.4 System Interactions and Changes. What is the change in linear momentum?

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AP Physics 1: 2.3 System Interactions and Changes 193 Views


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Description:

AP Physics 1: System Interactions and Changes Drill 2, Problem 3. What is the acceleration of the box?

Language:
English Language

Transcript

00:00

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

00:05

Brought to you by static friction Some materials have a

00:08

low coefficient of friction And with other materials like say

00:12

us in our bed almost no amount of force can

00:15

make a move All right twenty kilogram boxes dropped onto

00:18

his surface with a static friction coefficient of zero point

00:21

five in a kinetic friction coefficient of zero point two

00:24

a force of eighty newtons is applied to the box

00:28

What is the acceleration of the box And here the

00:32

potential answers in meters per second squared All right well

00:35

we here at shmoop love information We crave it but

00:39

there is such a thing as too much information For

00:42

example one time we told a friend that we still

00:44

sleepin batman pajamas And that was definitely a t m

00:47

i And this question wealth a little tricky because it

00:50

has too much information also but let's tackle the math

00:53

First first thing we have to do is get this

00:55

box moving And to do that we need to overcome

00:58

the force of static friction Well to calculate that force

01:01

we just multiply the normal force in this case mass

01:04

Times Gravity by the coefficient of friction so here's the

01:07

equation Once we have the numbers we need we plug

01:11

him in and find that the force of friction is

01:13

one hundred newtons Since the force acting on the box

01:17

is only eighty new queens the box is going nowhere

01:20

fast so the correct answer is just option a zero

01:22

meters per second squared and sense is not gonna budge

01:26

The kinetic friction coefficient doesn't matter No movement equals no

01:30

kinetic friction That's What we mean by t m i

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