Question

Why is it necessary to separate
contact force into a normal force and
frictional force? Give at least two
reasons.​

Answer 1

Answer:

Friction always acts to oppose any relative motion between surfaces. Hence it is necessary to separate these two forces as they work in opposite direction in a same body and movement of a body depends on them.

Answer 2

Answer:

Explanation:

Friction always acts to oppose any relative motion between surfaces. Hence it is necessary to separate these two forces as they work in opposite direction in a same body and movement of a body depends on them.