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ivanzaharov [21]
3 years ago
11

The work done on an elevator that has a mass of 1000kg and lifted 4m in 10 seconds is how many joules.

Physics
1 answer:
GaryK [48]3 years ago
5 0

Answer:

39,200 Joules

3920 watts

Explanation:

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Two point charges 3q and −8q (with q > 0) are at x = 0 and x = L, respectively, and free to move. A third charge is placed so
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Answer:

Explanation:

The unknown charge can not remain in between the charge given because force on the middle charge will act in the same direction due to both the remaining charges.

So the unknown charge is somewhere on negative side of x axis . Its charge will be negative . Let it be - Q and let it be at distance - x on x axis.

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force on it due to -Q and -8q will be equal

kQ . 3q / x² = k3q  8q / L²

Q = 8q  (x² / L²)

so charge required = - 8q  (x² / L²)

and its distance from x on negative x side = √3 L / (2√2 - √3 )

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What are the three factors needed for Newton’s Second Law?
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