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2 years ago

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A brick is released with no initial speed from the roof of a building and strikes the ground in 2.50 s, encountering no apprecia

ble air drag. How tall, in meters, is the building?

1 answer:

Elenna [48]2 years ago

6 0

Answer:A brick is released with no initial speed from the roof of a building and strikes the ground in 2.50 s, encountering no ..

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3 years ago

The rod of the fixed hydraulic cylinder is moving to the left with a constant speed vA = 25 mm/s. Determine the corresponding ve

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Explanation:

let vertical distance from A to C be $h=250mm$ the constraint equation is:

$l_{ac} +l_{ab} =L$

we want to find $l_{bc}$ distance can be written as $l_{bc} =h_{1}+h_{2}$ which we will find by using Pythagorean theorem h 1 is a constant and can be written as h:

$h_{2} =\sqrt{l_{ab}^2- s_{A} ^2}$

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taking derivative w.r.t time we get

$h^._{2} =-v_{B =(l_{ab} l_{ab} ^.-s_{A} v_{A} )/h_{2}$

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given $s_{A} =425mm$ which gives us

$l_{ab} =1050-\sqrt{450^2+250^2} =556.923mm\\\\h_{2} =\sqrt{556.923^2-425^2}=359.914mm$

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3 years ago