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Ilia_Sergeevich [38]
3 years ago
10

A 10n falling object encounters 4n of air resistance. what is the net force on the object?

Physics
1 answer:
Margaret [11]3 years ago
5 0
It would be 6n down.
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Answer:

a) The change in potential energy of a 3.0 kilograms backpack carried up the stairs.

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Explanation:

Let consider the bottom of the first floor in a building as the zero reference (z = 0\,m). The change in potential energy experimented by a particle (\Delta U_{g}), measured in joules, is:

\Delta U_{g} = m\cdot g\cdot (z_{f}-z_{o}) (1)

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\Delta U_{g} = (3\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot (4.1\,m-0\,m)

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\Delta U_{g} = -2665\,J

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