Friction
Objects become charged when electrons move from object to another
If they are in close contact, the hot object transfers heat to the cold object until both objects are equal in temperature. After which the temperature loss is reduced at the same rate until both objects have cooled to ambient temperature (the temperature of the surrounding air). If they are not in close contact, then most of the heat is dispersed into the air.
Relative motion is the concept that the motion of all objects is relative to other objects. If you are sitting still right now you are not moving relative to the earth, however you are moving relative to sun.
contact force:when two objects are in contact with each other it is called contact force.non-contact force:when two objects are not in contact with eachover
A non-contact force is any force applied o an object by another body that is not in direct contact with it,while A contact force is a force applied to a body by another body that is in contact with it. however it is to be noted that the origin of all contact forces can be traced to non-contact force.
Friction
No. Friction is a force that decreases the relative speeds of objects in contact with one another. Gravity is an attractive force that exists between all particles of matter.
Objects become charged when electrons move from object to another
Relative motion is : The comparison of motion between two different objects from the view of another object
Contact force means that objects need to be in contact for there to be a force. "Action at a distance" means the objects do NOT need to touch one another directly.
In physics, a contact force is a force that acts at the point of contact between two objects A contact force is a force applied to a body by another body that is in contact with it.
If they are in close contact, the hot object transfers heat to the cold object until both objects are equal in temperature. After which the temperature loss is reduced at the same rate until both objects have cooled to ambient temperature (the temperature of the surrounding air). If they are not in close contact, then most of the heat is dispersed into the air.
Relative motion is the concept that the motion of all objects is relative to other objects. If you are sitting still right now you are not moving relative to the earth, however you are moving relative to sun.
In physics, a contact force is a force that acts at the point of contact between two objects A contact force is a force applied to a body by another body that is in contact with it.
Friction wasn't invented, it is an interaction between objects : "Friction is the force resisting the relative lateral motion of two solid surfaces in contact, or a solid surface in contact with a fluid"
A change in an objects position relative to a reference point is called motion.
A change in an objects position relative to a reference point is called motion.