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3 years ago

If we decrease the amount of force, and keep all other factors the same, what will happen to the amount of work?

Physics

2 answers:

kozerog [31]3 years ago

8 0

The answer is A. I am sure of it.

Travka [436]3 years ago

7 0

Answer:

A: The amount of work will go down because the distance will decrease.

Explanation:

A force is a push or pulls that is capable of changing the state of motion of an object. Force is measured in Newton

Work done is the amount of energy produced by a body when acted by a force over a distance. A product of force and distance, it is measured in joule

Amount of Work done is a product of force and distance, the formula for work done is given in equation 1;

W = f x d .......................................................1

where W is work done

f is the force

d is distance

from equation 1 the work done by an object is directly proportional to the force applied on the body. This means that an increase in the force will always result in an equivalent increase in work done by the body.

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3 years ago

Blaise Pascal duplicated Torricelli's barometer using a red Bordeaux wine of density 965 kg/m3 as the working liquid (see figure

pogonyaev

Answer:

a) h=10.701m

b) No. On this case a liquid like wine is not good as the mercury, because the wine is composed of water, alcohol and other elements, but specially the alcohol evaporates much easier than the mercury, and that will cause malfunction in the vacuum of the baroemter used for the experiment.

Explanation:

The Torricelli's experiment "was invented by the Italian scientist Evangelista Torricelli and the most important purpose of this experiment was to prove that the source of vacuum comes from atmospheric pressure"

Pressure is defined as "the force that is applied on any object in the direction perpendicular to the surface of the object in the unit area is known as the pressure. There are various types of pressure".

Part a

We have the density for the red Bordeaux wine given $\rho=965\frac{kg}{m^3}$ , the atmospheric pressure on the Toriccelli's barometer is given by:

$P_{atm}=\rho g h$

Solving for the height of wine in the column we have this:

$h=\frac{P_{atm}}{\rho g}$

And replacing we have:

$h=\frac{101300Pa}{965\frac{kg}{m^3} 9.81\frac{m}{s^2}}=10.701 m$

So the height of the red Bordeaux wine would be h=10.701m. A very high value on this case if we compare with the usual values for this variable.

Part b

No. On this case a liquid like wine is not good as the mercury, because the wine is composed of water, alcohol and other elements, but specially the alcohol evaporates much easier than the mercury, and that will cause malfunction in the vacuum of the baroemter used for the experiment.

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3 years ago