State clearly how the pith ball electroscope may be used to test for the kind of charge on a body

1 answer:

5 0

An object with a known charge is first brought close to the ball so as to induce the opposite charge. Lets say we brought a positive object, so the ball will be negatively charged. Afterwards, the object with the unknown charge is brought closer. If the ball is attracted, then the object is positively charged and if it is repelled then the object is negatively charged.

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Answer:

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Explanation:

Given parameters:

Weight of the man = 800N

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Unknown:

Gravitational potential energy gained = ?

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Gravitational potential energy = weight x height

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Natasha_Volkova [10]

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Explanation:

The escape velocity equation for a craft launched from the Earth surface is:

$V_{e}=\sqrt{\frac{2GM}{R}}$

Where:

$V_{e}$ is the escape velocity

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However, in this situation the craft would be launched at a height $h=54000 km=54000000 m$ over the Eart's surface with a space elevator. Hence, we have to add this height to the equation: