under which condition is the net force calculated by the subtraction of forces ?
Answers
Answer:
In the statement of Newton's first law, the unbalanced force refers to that force that does not become completely balanced (or canceled) by the other individual forces. If either all the vertical forces (up and down) do not cancel each other and/or all horizontal forces do not cancel each other, then an unbalanced force exists. The existence of an unbalanced force for a given situation can be quickly realized by looking at the free-body diagram for that situation.
The net force is defined as is the sum of all the forces acting on an object. Net force can accelerate a mass. Some or the other force acts on anybody either at rest or motion. The net force is a term used in a system when there is a significant number of forces.
If N is the number of forces acting on a body, the net force formula is given by,
FNet = F1 + F2 + F3….+ FN
Where,
F1, F2, F3….FN is the forces acting on a body.
Net force when a body is at rest:Net force when a body is at rest
When the body is at rest, the net force formula is given by,
FNet = Fa + Fg.
Where,
Fa = applied force,
Fg = gravitational force.
Net force when a body is in motion:
Net force when a body is in motion
When a force is applied on the body, not only the applied force is acting there are many other forces like gravitational force Fg, frictional force Ff and the normal force that balances the other force.
Therefore, the net force formula is given by,
FNet = Fa + Fg + Ff + FN.
Where,
Fa = applied force,
Fg = gravitational force,
Ff = frictional force,
FN = normal force.