Question

causes to decrease the efficiency of machine

Answer 1

Answer:

due to the presence of friction on machine

Explanation:

input work is not equal to output work

Answer 2

Answer:

● The two cases to decrease the efficiency of machine are friction produced in the machine and the tightness of the parts of the machine and also heat generated by the work done by the machine.

● Effectiveness of a machine is the proportion of yield vitality to enter vitality.

● It is normally communicated as a rate consequently:

efficiency = ( output vitality or energy ) / ( input energy ) * 100

The yield vitality is never equivalent to the information vitality in machines since some measure of vitality is constantly lost by heat because of moving parts.