ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


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
250 Views

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
172 Views

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

See All

AP Physics 1: 3.5 System Interactions and Changes 180 Views


Share It!


Description:

AP Physics 1: System Interactions and Changes Drill 3, Problem 5. Which of the following are true about the cart's motion?

Language:
English Language

Transcript

00:00

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

00:05

Brought to you by grocery shopping while hungry Because when

00:09

else will we remember that we need twelve boxes of

00:11

cookies are checking falling graph Okay consider the graph of

00:16

a carts displacement Which of the following are true about

00:20

its motion will select two answers And here are the

00:22

options All right well this is definitely one of those

00:26

cards at the grocery store with that wheel that's all

00:28

wonky making it impossible to push All right well let's

00:32

look at our options Starting from the top Is the

00:34

force acting on the cart constant Well looking at this

00:37

graph it doesn't look very constant Tow us The velocity

00:40

is all over the place as we know velocity is

00:42

the rate of displacement overtime But this card is like

00:45

us after spending an hour studying physics It doesn't know

00:49

if it's coming or going so we can rule out

00:52

a in order for option b to be correct The

00:54

card has to be constantly gaining kinetic energy If the

00:58

graph showed the cart consistently going in one direction then

01:01

be would be right But we see the car goes

01:04

In reverse and goes forward than slows down and goes

01:07

in reverse again doesn't constantly gain kinetic energy at all

01:11

so we can throw be out as well For c

01:13

to be right the cart has to be going in

01:15

at least two different directions We can see that the

01:18

displacement or movement starts out negative then climbs into the

01:22

positive range So the movement is definitely in at least

01:25

three directions making option c one of the correct answers

01:29

And does the car have a net gain of kinetic

01:31

energy Well it ends up with a positive velocity after

01:35

starting from zero So yeah he is correct as well

01:38

Now that we got all that figured out we need

01:40

to go figure out where to hide all these cookies

Related Videos

AP Physics 1: 2.5 Changes and Conservation Law
445 Views

AP Physics 1: 2.5 Changes and Conservation Law. At what point(s) in this situation is energy lost in any form?

AP Physics 1: 1.4 Waves
181 Views

AP Physics 1: 1.4 Waves. Which of the following is technically true for Max as he stands at the edge of oblivion? 

AP Physics 1: 1.4 Changes and Conservation Laws
177 Views

AP Physics 1: 1.4 Changes and Conservation Laws. Find the current across R2.

AP Physics 1: 2.4 Changes and Conservation Laws
172 Views

AP Physics 1: 2.4 Changes and Conservation Laws. Which of the following circuits should the students use?

AP Physics 1: 1.5 Waves
12 Views

AP Physics 1: 1.5 Waves. What can possibly occur when the two waves reach each other?