Question

s/Cartilage
5. Cartilage is present in joints of our body, which helps in their smooth movement. If
cartilage wears off, how would this affect the movement of joints? Is friction here a
(2)
friend or foe?
EMISTRY
been​

Answer 1

5.The wearing off a cartilage will increase the friction. As a result the movement of joints will become difficult which may lead to joint pain.....

(2)Friction is said to be a necessary evil because it is useful as well as harmful..