3 years ago

Approximately how old is the earth?

Physics

1 answer:

Wewaii [24]3 years ago

6 0

<span>C) 4.5 billion years old</span>

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100 points for this easy question :D<br> What's Coulomb's Law? (in your own words)

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When you walk at an average speed (constant speed, no acceleration) of 20.7 m/s in 75.8 sec you will cover a distance of______?

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Answer:

You will cover a distance of 1569.06 metres. Or you could round down to 1,569m.

Explanation:

20.7*75.8=1563.06

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4 years ago

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3 years ago

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A sled is being pulled along a horizontal surface by a horizontal force F of magnitude 600 N. Starting from rest, the sled speed

Simora [160]

Answer:

1440 W

Explanation:

First of all, we can find the total displacement of the sled, which is given by

$d=\frac{1}{2}at^2$

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Substituting,

$d=\frac{1}{2}(0.08 m/s^2)(60 s)^2=144 m$

Now we can find the wotk done on the sled, equal to the product between force and displacement:

$W=Fd=(600 N)(144 m)=86,400 J$

And finally we can fidn the average power, which is the ratio between the work done and the time taken:

$P=\frac{W}{t}=\frac{86,400 J}{60 s}=1440 W$

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3 years ago