Final answer:
When sawing a notch in a PVC pipe, the blade should be less rigid than when sawing a steel rod.
Step-by-step explanation:
When sawing a notch in a PVC pipe, the blade should be less rigid than when sawing a steel rod. This is because PVC is a softer material compared to steel. When using a rigid blade on PVC, there is a higher chance of the pipe cracking or breaking due to the blade being too stiff. A less rigid blade allows for better control and reduces the risk of damaging the PVC pipe.