Question

Real-world efficiencies are generally very high, in the 90 percent range.

Please select the best answer from the choices provided.
A.True
B.False

Answer 1

The efficiency of a simple machine is always less than 100 percent due to friction.

Step-by-step explanation:

The statement that the efficiency of a simple machine is always less than 100 percent due to friction is True.

Efficiency is a measure of how well a machine converts input work into useful output work. In reality, no machine is perfectly efficient because some of the input work is always lost as heat energy due to friction. This phenomenon reduces the overall efficiency of the machine.

For example, when using a car engine, not all of the energy from burning fuel is converted into useful work. Some of the energy is lost as heat, reducing the efficiency of the engine.