The only way a single force can fail to change an object's motion is
if the magnitude of the force is zero.
(Don't go off on a tale of a "balanced force". There's no such thing as a balanced force.
Groups of forces can be balanced. The forces themselves can't.)
a force results when two interacting bodies are not in direct physical contact with each other. eg : gravitational force, magnetic force and electrical force
a force
Greater force
No.
Yes. Gravity can be considered a noncontact force. There is no requirement of the force to touch the object which the force exerts itself on.
friction.
the lines of force are not real. these lines of force are imaginary lines. so we can not touch it.
a force
Greater force
No.
Yes. Gravity can be considered a noncontact force. There is no requirement of the force to touch the object which the force exerts itself on.
no
friction.
Because the atoms don't touch
Yes. The definition of a force is a push or a pull. So, as long as the object moves, a force has indeed acted upon it.
Force of push or pull
Friction
Swimmers use touch pads by touching them with their fingers or hand. They have sensitive sensors that do not require great force to have them register the touch.