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2 years ago

URGENT!!!!

Physics

1 answer:

Nastasia [14]2 years ago

3 0

Answer:

8 cm

Ladder is safer than to walk on it

Explanation:

Streched = Final length - initial length

= 66 - 58

= 8 cm

When your are walking along frozen ice pond your weight is not distributed .It's acting on directly on the ice pond because of contact Area is too small between pond and you. There for According to pressure equation ,

P = F/A

When area is less pressure is less.

If use ladder instead of going by foot. Contact area will be high between pond and ladder. There for pressure is reduced .

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As we know by the formula of bulk modulus

$B = \frac{\Delta P}{-\Delta V/V}$

now we can rearrange it as

$\Delta V/V = -\frac{\Delta P}{B}$

$V_f - V = -V\frac{\Delta P}{B}$

now the final volume after pressure is applied is given as

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now we know that

$\Delta P = 3 \times 10^5 Pa$

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Check attachment for the diagrammatic representation