3 years ago

Have thick wallsChamaer o the heartwhich

Physics

1 answer:

yulyashka [42]3 years ago

5 0

I don’t get it explain

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an elevator mass of 7700 kg falls from a height of 32 m after a sudden failure in the hoisting cable. The mass is stopped by a s

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Answer:k=28.29 kN/m

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Given

mass $m =7700 kg$

height from which Elevator falls $h=32 m$

Let x be the compression in the spring

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$\frac{kx^2}{2}=mg(h+x)$ ----------1

also maximum acceleration is 5g

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here $a=-5g$

$kx=mg-m(-5g)=6mg$

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$0.5\times k\times (\frac{6mg}{k})^2=mg(h+\frac{6mg}{k})$

$18\frac{(mg)^2}{k}=mgh+6\frac{(mg)^2}{k}$

$k=12\cdot \frac{mg}{h}$

$k=12\times \frac{7700\times 9.8}{32}$

$k=28.29 kN/m$

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The crest of one wave with an amplitude of 4 m meets up with the crest of a second

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When sound is created it travels to the car through a

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Three dimensional would loose faster

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Have thick wallsChamaer o the heartwhich​

Have thick wallsChamaer o the heartwhich