## 10x-17 Springs and Tables

• 0:00 - 0:04
For this question, we're going to think about a table that, by the way, is a table.
• 0:04 - 0:07
On this table we're going to put a giant spring.
• 0:07 - 0:11
Here's the spring, uncompressed, not stretched, totally at equilibrium,
• 0:11 - 0:14
totally boring, so let's compress it.
• 0:14 - 0:18
The way we're going to do that is by squeezing it back a distance Δx,
• 0:18 - 0:23
and by putting a little block here with mass m, of course.
• 0:23 - 0:27
Of course--I shouldn't even have to say it--this table is frictionless.
• 0:27 - 0:32
Of course, this table has some height h and the spring has some constant, some stiffness, k.
• 0:32 - 0:35
When I squeeze this, if I let go what's going to happen?
• 0:35 - 0:40
The mass is going to fling forward and shoot off and land somewhere over here.
• 0:40 - 0:44
Your job for this question is to tell me what is this distance d.
• 0:44 - 0:46
Now, you can't answer it yet. Let me give you some numbers.
• 0:46 - 0:49
The height of the table is 2 m. The mass is 1 kg.
• 0:49 - 0:53
Δx is 25 cm--not meters.
• 0:53 - 0:56
The spring constant is 350 N/m.
• 0:56 - 1:01
That should be enough information for you to tell me what is d.
• 1:01 - 1:05
How far will this object fall from the table when it finally lands?
• 1:05 -
You can enter your answer here in meters.
Cím:
10x-17 Springs and Tables
Video Language:
English
Team:
Udacity
Projekt:
PH100 - Intro to Physics
Duration:
01:08
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