Explain why the efficiency of a machine is less than 100
The efficiency of a machine is often less than 100% due to various factors such as friction, heat loss, and energy waste.
Friction occurs when two surfaces rub against each other, causing resistance and reducing the efficiency of the machine. This can result in energy loss and decreased performance. Additionally, heat loss can occur when energy is converted into heat instead of being used to perform useful work.
Furthermore, machines may also experience energy waste due to factors such as vibrations, improper maintenance, and design flaws. These inefficiencies can lead to a decrease in the overall efficiency of the machine and result in less than 100% efficiency.
Overall, it is important to consider these factors when designing and using machines in order to maximize their efficiency and performance.