Question

Which properties are essential for a material used to make safety helmets that must protect against sudden impacts?

(Select the three correct answers.)

(1 point)
Responses

High elasticity, which would let it stretch too much.
High elasticity, which would let it stretch too much.

Sufficient strength to resist being punctured or broken.
Sufficient strength to resist being punctured or broken.

Low density that might compromise its overall structure.
Low density that might compromise its overall structure.

High toughness to absorb the force from an impact.
High toughness to absorb the force from an impact.

High brittleness, which would cause it to shatter easily.
High brittleness, which would cause it to shatter easily.

Good durability to withstand regular wear and environmental exposure.

Answer 1

- Sufficient strength to resist being punctured or broken.
- High toughness to absorb the force from an impact.
- Good durability to withstand regular wear and environmental exposure.

Reason: Helmets need strength and toughness to stop penetration and absorb impact energy without shattering, and durability for long-term protection. High elasticity or high brittleness are undesirable, and the phrasing about low density compromising structure indicates it's not a desired property.