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marin [14]
3 years ago
13

If a 8860 N horse has been lifted 4.5 meters by a crane, what work does it have?

Physics
1 answer:
Lana71 [14]3 years ago
4 0
<span>Data:
W (work) = ? (Joule)
P (weight) = 8860 N
h (height) = 4.5 m

Formula:
</span>W = P*h
<span>
Solving:
</span>W = P*h
W = 8860*4.5
\boxed{\boxed{W = 39870\:Joule}}\end{array}}\qquad\quad\checkmark
<span><span>

</span></span>
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The acceleration of automobiles is often given in terms of the time it takes to go from 0 mi/h to 60 mi/h. One of the fastest st
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9.934 m/s²

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Final speed of the Bugatti Veyron Super Sport = 60 mi/h

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A body is dropped from the roof of a 20 m high building by how much:
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Answer:

t = 2.01 s

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Explanation:

It's know through the International System that the earth's gravity is 9.8 m/s², then we have;

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==================================================================

Time

Use formula:

  • \boxed{t=\sqrt{\frac{2*h}{g}}}

Replace:

  • \boxed{t=\sqrt{\frac{2*20m}{9.8\frac{m}{s^{2}}}}}

Everything inside the root is solved first. So, we solve the multiplication of the numerator:

  • \boxed{t=\sqrt{\frac{40m}{9.8\frac{m}{s^{2}}}}}

It divides:

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The square root is performed:

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==================================================================

Final Velocity

use formula:

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Replace:

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Multiply:

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==================================================================

How long does it take to reach the ground?

Takes time to reach the ground in <u>2.01 seconds.</u>

How fast does it hit the ground?

Hits the ground with a speed of <u>19.7 meters per seconds.</u>

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3 years ago
why can light from the sun cause skin cancer but the light from a light bulb cannot cause skin cancer?
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