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Energy Transformation

Give 2 reason...

Question

Give 2 reasons for the efficiency of a machine to be less than 100%.

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Solution

The efficiency of a machine is never 100 % from losses due to
(a) friction between various components
(b) heat energy emission

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Similar questions

Define the term efficiency of a machine. Give two reasons for a machine not to be $100 %$ efficient?

Select the incorrect statement :

(a) A machine always has the efficiency less than $100 %$ .

(b) The mechanical advantage of a machine can be less than 1.

(c) A machine can be used as a speed multiplier.

(d) A machine can have the mechanical advantage greater than the velocity ratio.

Q. According to the degradation of energy in all machines,
the efficiency of all machines is less than 1 or less than 100%.
But according to the principle of hydrolics, small amount of force applied on a smaller piston results in large force on a bigger piston. So, here the efficiency is greater than 1 or more than 100%,
So how is this possible as it is just a machine?

Q. For a machine of efficiency 100%, mechanical advantage:

[1 mark]

Q. How is the mechanical advantage related with the velocity ratio for an actual machine? State whether the efficiency of such a machine is equal to

1

1

1

.

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