Question

How do you express, mathematically, that no external force is acting on a body?

a) ( F_{{external}} = 0 )

b) ( F_{{net}} = 0 )

c) ( a = 0 )

d) ( W_{{external}} = 0 )

Answer 1

The correct mathematical expression that represents no external force acting on a body is option (a) (F_{external} = 0). When the net external force on a system is zero, it means that there are no external forces acting on the body. This condition is known as equilibrium.

Step-by-step explanation:

The correct mathematical expression that represents no external force acting on a body is option (a) (F_{external} = 0).

When the net external force on a system is zero, it means that there are no external forces acting on the body.

This condition is known as equilibrium, and it is necessary for the body to remain at rest or move with constant velocity.

It's important to note that even when there are no external forces, there may still be internal forces within the system.

These internal forces do not affect the overall motion of the body and cancel each other out.