Question

Q. write the statements of law of motion that gives :
1) concept (definition) of force.
2) an expression of force.

Answer 1

1. The law which gives concept or definition of force is Newton's second law.
2. The law which gives expression of force is also Newton's second law.

Newton's second law: The net force acting on a body is directly proportional to its rate of change of momentum.

Mathematically, second law can be expressed as: F = ma

Answer 2

Newton's Second Law Of Motion:The rate of change of change of momentum is directly proportional to the force applied and it takes place in the direction of force.
Mathematical Expression : F=ma (where f= force,m= mass and a= acceleration).
                i hope that this will help u.