How does the output work compare to the input work for a machine that has efficiency

Physics

1 answer:

Leona [35]1 year ago

8 0

(a) For a machine with 100% efficiency, the output work is equal to input work.

(b) For a machine with less than 100% efficiency, the output work is less than the input work.

<h3>What is efficiency of machine?</h3>

The efficiency of a machine indicates how well its input work is converted to useful output work.

It is a major factor determines the usefulness of a machine and is the fraction or percentage of the output energy divided by the input energy.

Mathematically, the formula for efficiency of a machine is given as;

E = output work / input work x 100%

For an ideal machine, the output energy (work) is equal to the input energy (work), and the efficiency of this ideal machine will be 100%.

Thus, a machine with 100% efficiency has not friction in the moving parts and the output work is equal to input work

In a real situation, friction always exists and the efficiency of a machine cannot be 100%.

A machine with less than 100% efficiency, some input work or energy in the machine is used to overcome friction and the output work is less than the input work.

Learn more about efficiency of a machine here: brainly.com/question/27325529

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irakobra [83]

Refraction refers to C. the bending of light rays when they pass from one medium into another

Explanation:

Refraction is a phenomenon typical of wave. Refraction occurs when a wave travels through the boundary between two different mediums. When this occurs, the wave changes speed, wavelength and direction (but the frequency remains the same).

In particular, the direction of the refracted ray is determined by Snell's Law:

$n_1 sin \theta_1 = n_2 sin \theta_2$