Final answer:
The torque output of a rotary pneumatic motor is majorly affected by the size of the load, due to its direct relation to the moment of inertia and the force needed to initiate rotation. Option B is the correct answer.
Step-by-step explanation:
The torque output of a rotary pneumatic motor is an important factor in determining its performance in various applications. Understanding what affects this torque is essential for efficiently utilizing the motor. When considering the factors that influence torque, it's necessary to remember that torque is the rotational equivalent of force. It is a measure of the effectiveness of a force in changing or accelerating a rotation, which includes changing the angular velocity over a period of time.
The three main factors that affect the torque created by a force relative to a specific pivot point are the magnitude of the force, the direction in which the force is applied, and the radius at which the force is applied from the axis of rotation.
These principles reflect how in everyday life, we intuitively understand that the farther from the axis we apply a force, and the more perpendicular the force is to the lever arm, the more effective the torque will be. Similarly, for a rotary pneumatic motor, factors such as the size of the load and the operating speed of the actuator will inherently influence the torque output. The correct option that corresponds to the question provided is (b) Size of the load, as it directly relates to the moment of inertia and the force required to produce the necessary torque.