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Xelga [282]
3 years ago
8

What is the net force on this object?

Physics
2 answers:
NemiM [27]3 years ago
6 0

There is no net vertical force.

The 20N upward is exactly balanced by the 20N downward.

There IS a net horizontal force.

(22N to the right) + (14N to the left)  =  8 N to the right.

The net force acting on this object is 8 newtons to the right.  

I hope this helped you :D

damaskus [11]3 years ago
5 0

Upward and downward forces cancel out. Net force is 8 newtons to the right

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Option b. Effective nuclear charge increases as we move to the right across a row in the periodic table

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The <em>effective nuclear charge </em>is a measure of how strong the protons in the nucleus of an atom attract the outermost electrons of such atom.

The <em>effective nuclear charge</em> is the net positive charge experienced by valence electrons and is calculated (as an approximation) by the equation: Zeff = Z – S, where Z is the atomic number and S is the number of shielding electrons.

The shielding electrons are those electrons in between the interesting electrons and the nucleus of the atom.

Since the shielding electrons are closer to the nucleus, they repel the outermost electrons and so cancel some of the attraction exerted by the positive charge of the nucleus, meaning that the outermost electrons feel less the efect of attraction of the protons. That is why in the equation of Zeff, the shielding electrons (S) subtract the total from the atomic number Z.

The <em>effective nuclear charge</em>, then, is responsible for some properties and trends in the periodic table. Here, you can see how this explains the trend of the atomic radius (size of the atom) accross a row in the periodic table.

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The net force acting on the body is given by :

F = ma

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