Question

what will happen if a snadbag is stretched ​

Answer 1

Answer:

If the plastic is stretched too tightly, the water force could puncture it. Place a row of tightly fitting sandbags on the bottom edge of the plastic to form a watertight seal along the water side.

Answer 2

Answer:

if sandbag is stretchable then bag will stretch on applying force and will come back to initial position when no force applied.

But if bag isn't stretchable then it'll be torn and sand will come out.