1. What is an ideal machine and what is its efficiency? Why is this not achievable in practice?
Answers
Answer:
The ratio of work done by the machine to the work done on the machine is known as the efficiency of the machine.
The ratio of work done by the machine to the work done on the machine is known as the efficiency of the machine.A machine in which no part of the work done on the machine is wasted is called an ideal or perfect machine. Thus, for an ideal machine, the work output is equal to the work input, i.e., the efficiency of an ideal machine is 1 (or 100 percent).
The ratio of work done by the machine to the work done on the machine is known as the efficiency of the machine.A machine in which no part of the work done on the machine is wasted is called an ideal or perfect machine. Thus, for an ideal machine, the work output is equal to the work input, i.e., the efficiency of an ideal machine is 1 (or 100 percent).Answer: In ideal machines , all the input energy should be converted to output energy . But , some part of energy is always lost in overcoming friction and input energy is always greater than output energy . Hence , no machine is ideal.
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