- #1

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I assume these two equations at least are needed.

- Impuls = p= m*v
- Energy = m*v^2/2

- B
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- #1

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I assume these two equations at least are needed.

- Impuls = p= m*v
- Energy = m*v^2/2

- #2

BvU

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- #3

nasu

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What browser do you use to access the link?

It doesn't seem to work with either Chrome or Firefox.

It doesn't seem to work with either Chrome or Firefox.

- #4

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The link works fine on Chrome for me.

- #5

nasu

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Now it works for me too.

Maybe something temporary down on their side.

Thank you.

Maybe something temporary down on their side.

Thank you.

- #6

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Thanks.

How to solve the first one? ive tried using both the momentum and energy equations, calculating the v for the hammer+nail weight knowing the hammer weight and hammer initial velocity. i got something like 9,73 and 9,86 but it says incorrect for both of them.

second question uses the answer (velocity) of first questions, just multiplied by the weight i guess to get the impulse?

third not sure

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marcusl

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- #8

jim mcnamara

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http://naldc.nal.usda.gov/naldc/download.xhtml?id=CAT88208690&content=PDF

See pp 35-39

Extraction resistance is approximately the same as resistance to driving, driving requires more. But this is as good as it gets. Otherwise you have to go to ASTM for particular applications.

- #9

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which wood are you talking abouthow far it is driven down into the wood?

answer depends on type of wood , thinness of nail , material of nail , impact time ,etc too many variables

take all but one factor const and plot a graph

this might take you somewhere close to final expression

- #10

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assuming const force acts on hammer always

now clock time taken to penetrate by slow motion cam

u/t gives retardation (u is initial velo)

plug retardation a in-

(u^2)/(2.a) gives penetration distance