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2 years ago

A steel beam hangs from a cable as a crane lifts the beam. What forces act on the beam?.

Physics

1 answer:

DerKrebs [107]2 years ago

7 0

The forces that act on the beam are gravity and tension in the cable .

Gravity can be defined as the force that exists almost among all material objects that exist in the universe . Gravity is operating among objects of all sizes starting from subatomic sized particles to clusters of galaxies .It is the force that causes the free fall of an apple from the tree on the ground and also the movement of planets around the sun .

Tension can be defined as a force along the length of a medium , the force here is especially carried by a flexible medium such as a rope or a cable . The SI unit of tension is Newton per meter .

The forces that act on the beam are gravity and tension in the cable .

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mote1985 [20]

1) The charge left on the fur is equal and opposite to the charge transferred to the rod:
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In fact, when the rod is rubbed with the fur, a net charge of $Q=-4.8 \cdot 10^{-9} C$ has been transferred to the rod, leaving it negatively charged. If we assume the fur was initially neutral, this means that we have now an excess of positive charges on the fur, and the amount of this charge must be equal (in magnitude, but with opposite sign) to the charge transferred to the rod.

2) The mass transferred to the rod is equal to the total mass of the electrons transferred to the rod.
The charge transferred to the rod is
$Q=-4.8 \cdot 10^{-9} C$
The charge of 1 electron is
$e=-1.6 \cdot 10^{-19} C$
So the number of electrons transferred is
$N= \frac{Q}{e}= \frac{-4.8 \cdot 10^{-9} C}{-1.6 \cdot 10^{-19} C}=3.0 \cdot 10^{10}$

The mass of 1 electron is $m=9.1 \cdot 10^{-31} kg$ , therefore the total mass transferred to the rod is
$M=Nm=(3 \cdot 10^{10})(9.1 \cdot 10^{-31} kg)=2.73 \cdot 10^{-20} kg$

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Given here that through the same region 2 electrons are pushed by same distance

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Since the two electrons are pushed through same electric field by same distance

So the product of E and d will be same

So the electric potential will be same as initial

so V = 1 volt for two electrons

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