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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: 1.5 System Interactions and Changes. How much energy is expended in one lap?
AP Physics 1: 2.1 System Interactions and Changes. What is the total angular momentum of the rod?
AP Physics 1: 2.1 System Interactions and Changes 199 Views
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AP Physics 1: 2.1 System Interactions and Changes. What is the total angular momentum of the rod?
Transcript
- 00:00
Thank you We sneak and here's your shmoop du jour
- 00:05
Brought to you by a spinning rod Not impressed Just
- 00:10
add some sparkles and ribbon and well you've got a
- 00:12
baton All right check out the following diagram this thing
- 00:17
chair All right a rod of length L hibbitts around
Full Transcript
- 00:21
its mid point A particle with mass m flies toward
- 00:25
it Add velocity v and sticks onto the end of
- 00:28
the rod What is the total angular momenta mb of
- 00:32
the rod and hear the potential answers a lot of
- 00:35
forms Okay well we're getting off easy here No need
- 00:40
to break out super computers to do heavy math We
- 00:42
just have to know our equations to answer this one
- 00:45
And since we've been studying day and night cram more
- 00:48
and more physics in your brain we know that the
- 00:50
equation for angular momentum is mass times velocity times the
- 00:54
distance to the center of the revolution In this question
- 00:59
the length is l but the radial distance is half
- 01:02
of l since the rod pivots on its mid point
- 01:05
So putting the variables together we get an equation that
- 01:08
looks like this The option b is the correct answer
- 01:11
And any time we want to see physics in motion
- 01:13
we break out the silver wonder Put on some tunes
- 01:16
from our favorite marching band And while we become one 00:01:19.57 --> [endTime] with khan
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