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An external force affects structures from the outside. They are divided into 2 groups live loads and dead loads
External force
effort force
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A bending force is an external force acting on an object that causes it to bend or deform. It is typically applied to an object from the outside to induce bending or flexing.
external force and internal force
A closed system in which the net external force is zero is in mechanical equilibrium.
An internal force is a force acted upon by an object to force another object's movement internally. An external force is a force exerted on an object based on the objects position and force applied on the object which causes the opposite forces change in motion.
graverty
An external force that moves or changes
Inertia can be overcome by applying an external force to an object. The greater the force applied, the quicker the object's inertia can be overcome. Once the external force is greater than the object's inertia, it will begin to move or change its speed/direction.
When no external force acts on a system of particles, the velocity of the center of mass remains constant. This is described by Newton's first law of motion, stating that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an external force.