Question

Explain why-

i) Sliding friction is less than static friction.

ii) Objects moving in fluids must have special shapes.​

Answer 1

Answer:

1.) For a given two surface, sliding friction is slightly lesser than that of the static friction because it is easy to move the object which already in motion than the object which is at rest.

2.) Objects moving in fluids face the friction of the fluid that opposes their motion. So Objects moving in fluids must have unique shapes called streamlined shapes to reduce the fluid friction.

Answer 2

Explanation:

I)because in sliding only some of the part is touching the surface

2) objects moving in the fluid face friction opposes the motion that's why...

hope it helps....( ◜‿◝ )♡