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AP Physics 1 Videos 86 videos
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. 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. Find the current across R2.
AP Physics 1: 1.1 System Interactions and Changes 196 Views
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Description:
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. Then we'll talk.
Transcript
- 00:00
Thank you We sneak and here's your shmoop du jour
- 00:05
Brought to you by jules as in units of work
- 00:08
not as in diamonds and rubies No i checked the
- 00:10
falling diagram This thing here all right A two kilogram
- 00:13
boxes lifted to a height of ten meters through the
Full Transcript
- 00:16
path indicated by the arrow What is the total work
- 00:20
done on the box and hear the potential answers money
- 00:23
jewels Well before we get started it's important to recognize
- 00:27
that we're dealing in physics math here not in real
- 00:29
world situations In math terms If we carry a piano
- 00:32
up two flights of stairs and then back down again
- 00:35
no work has been done on the piano After all
- 00:37
it hasn't had any net movement and the force has
- 00:40
been applied to it has been negated We'll work mathematically
- 00:45
speaking equals force times Displacement and displacement which is represented
- 00:50
by x means a total change in position of an
- 00:54
object Well in our question we think in terms of
- 00:57
direction the boxes moved four meters to the west Five
- 01:01
meters to the north four meters to the east and
- 01:05
another five meters north The four meters east and west
- 01:09
Cancel each other out there's No displacement there because in
- 01:12
terms of lateral movement we end up where we started
- 01:16
so our total displacement is ten meters Now to determine
- 01:20
the force use we use our trusty equation force equals
- 01:23
mass times acceleration because the box is being moved up
- 01:27
The acceleration comes from gravity which is about ten meters
- 01:30
per second squared and since we know the mass of
- 01:33
the boxes two kilograms we can calculate the force Let's
- 01:37
go ahead and plug our numbers into the work equation
- 01:40
Here Work equals twenty newton's times ten meters for a
- 01:43
total of two hundred jewels So option b is the
- 01:46
correct answer Remember no matter how hard we work while
- 01:49
studying in physics terms There's No work being done if 00:01:52.85 --> [endTime] we just stay at our desk
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