friction is a contact force
It's a contact force:
The friction force is the force exerted by a surface as an object moves across it or makes an effort to move across it.
That force is when an object is sliding on a surface, even thought it's not always the case, the friction force often opposes the motion of an object.
For example, if a book slides across the surface of a desk, then the desk exerts a friction force in the opposite direction of its motion.
friction is a contact force
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non contact
It is a contact force.
a contact force requires two bodies to either touch each other(are in contact) or are interacting through a medium(rope, pole). example of contact force is friction.
Since friction means a contact force, the nature of contact will influence friction force. Smoothness of objects affect the friction force. However, as contact pressure rises, the friction does not rise.
Static electricity is a non contact force because : Whether an object is charged by conduction or induction or even by friction they acquire a charge and the objects acquire opposite charge in induction and friction but same charge in conduction. So when the charged body is brought near an uncharged body if they have opposite charge they will be attracted towards the charged body due to the movement of ionic particles.
non contact
It is a contact force.
contact
a contact force requires two bodies to either touch each other(are in contact) or are interacting through a medium(rope, pole). example of contact force is friction.
The three contact forces is push or pull or friction & the non contact force is gravity & magnitism.
Since friction means a contact force, the nature of contact will influence friction force. Smoothness of objects affect the friction force. However, as contact pressure rises, the friction does not rise.
Static electricity is a non contact force because : Whether an object is charged by conduction or induction or even by friction they acquire a charge and the objects acquire opposite charge in induction and friction but same charge in conduction. So when the charged body is brought near an uncharged body if they have opposite charge they will be attracted towards the charged body due to the movement of ionic particles.
Magnetic force is a non-contact force.
Generally, the higher the contact force, the higher the friction.
Contact.
A spring force is a contact force not a non-contact force.
Force can be both contact or non-contact