Question

In what way are we different?
(a) Muscular force and mechanical force.
(b) The force of friction and gravitational force.

Answer 1

The force applied by the muscles of the body is called muscular force. This force is applied when interacting bodies are directly in physical contact with each other.

 Mechanical force is a type of energy which requires medium to travel and bends, scratches or breaks the objects on which it is applied.

Gravitational force is the force of attraction applied by the earth. It is responsible for pulling the object down. While friction is the force which opposes the motion. 

Answer 2

I only know one answer (a) A muscular force is a force applied by a human and mechanical force is a force applied by a mechanism