Final answer:
The two distinct parts of an open-loop control system are the input and the output. An open-loop system does not have a feedback mechanism and relies solely on the input command. In contrast, a closed-loop system uses feedback to make adjustments and improve accuracy.
Step-by-step explanation:
The two distinct parts of an open-loop control system are the input and the output. The input part of the system receives a command or a setpoint from the user or an external source. In the case of a child tossing toy blocks into a bin, the input could be the desired position or trajectory of the blocks. The output part of the system is responsible for carrying out the command by generating a suitable response. In this example, the output could be the child's arm motion and hand coordination to accurately toss the blocks into the bin.
An open-loop control system differs from a closed-loop control system in that it does not have any feedback mechanism to monitor or adjust the output based on the system's performance. In an open-loop system, the output is solely based on the input command, regardless of any errors or disturbances. On the other hand, a closed-loop control system incorporates feedback to continuously compare the output with the desired setpoint and make necessary adjustments to achieve better accuracy and stability.