Question

State whether in actual machines, the output energy is greater or lesser than input energy. Give reason.

Answer 1

Actual machines:

1. The term "ideal machine" refers to a machine that operates at $100\%$ efficiency. In reality, no machine is $100\%$ efficient, these types of machines are known as actual machines.
2. In actual machines, energy is lost in real machines against the friction and the weight of moving components.
3. Thus, in actual machines, the output energy is lesser than the input energy.