What material must the tape measure be made of?

What material must the tape measure be made of?

• A. Non-stretchable material, preferably fiberglass
• B. Stretchable fabric
• C. Metal tape with springs
• D. Plastic flexible tape

Answer: (A)

The key idea is that a tape measure must not change length when it’s pulled taut. If the material stretches under tension, the reading will be longer than the actual distance, causing inaccurate measurements. A non-stretchable material keeps the marked length constant, which is essential for precision. Fiberglass is a common choice because it resists stretching, is lightweight, durable, and flexible enough to wrap around edges. It also handles moisture and temperature changes without significant length shifts. In contrast, stretchable fabrics would lengthen when pulled, and plastic or metal tapes can creep or deform under load, leading to errors. So, using a non-stretchable material like fiberglass ensures measurements stay accurate.

The key idea is that a tape measure must not change length when it’s pulled taut. If the material stretches under tension, the reading will be longer than the actual distance, causing inaccurate measurements. A non-stretchable material keeps the marked length constant, which is essential for precision. Fiberglass is a common choice because it resists stretching, is lightweight, durable, and flexible enough to wrap around edges. It also handles moisture and temperature changes without significant length shifts. In contrast, stretchable fabrics would lengthen when pulled, and plastic or metal tapes can creep or deform under load, leading to errors. So, using a non-stretchable material like fiberglass ensures measurements stay accurate.