Question 7
A knot tied in a nylon rope comes loose more easily than one tied in a coir rope. Why?
The right answer is the one marked above.
The friction between coir fibres is greater than between nylon fibres. The same friction is what holds a twisted rope together when a large force is applied to it.
Strength is a different property altogether. A rope can be very strong and still hold a knot badly, which is exactly the case with nylon.