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A pile driver drives a post into the ground. The mass of
thepile driver is 2500kg and it is dripped through a height of 8.0m
oneach stroke. if the resisting force of the ground
is4.0*106N, how far is the post driven in on
eachstroke?

Respuesta :

Answer:

D = 0.049 m per stroke

Explanation:

Given data:

Mass of pile driver - 2500 kg

height of dripped = 8.0 m

Resisting force = 4*10^6 N

Energy of drive is calculated as E

E = fd

  [tex]= mgH = 2500\times 9.8\times 8 = 196000 J[/tex]

distance of post driver is calculated as

[tex]D = frac{E}{f} = \frac{196000}{4\times 10^6}[/tex]

D = 0.049 m per stroke

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