Physics, 09.01.2020 05:31 DesperatforanA

Aperson whose weight is 5.20 x 10^2 n is being pulledup
vertically by a rope from the bottom of a cave that is35.1 m deep.
the maximum tension that the rope can withstandwithout breaking is
569 n. what is the shortest time, starting fromrest, in which the
person can be brought out of the cave?

Answers: 2

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Answers

Answer from: nommies005

Explanation:

Given

Weight of Person $W=5.20\times 10^{2} N$

Cave is h=35.1 m deep

Breaking stress T=569 N

Net Force on Person

$F_{net}=569-520=49 N$

$a_{net}=\frac{F_{net}}{\frac{W}{g}}$

$a_{net}=\frac{49}{\frac{520}{9.8}}$

$a_{net}=0.923 m/s^2$

The shortest time such that the person can be taken out of cave

$h=ut+\frac{1}{2}at^2$

where

h=distance moved

t=time

a=acceleration

$35.1=0+\frac{1}{2}(0.923)(t)^2$

t^2=76.05

$t=\sqrt{76.05}$

$t=8.72\ s$

Answer from: Quest

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Aperson whose weight is 5.20 x 10^2 n is being pulledup
vertically by a rope from the bottom o...

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