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Contact Forces require __________ to act on an object.
touching
Examples of Contact Forces include __________, thrust, and friction.
applied forces
The force that opposes the motion of an object is called __________.
drag
The force that acts perpendicular to the surfaces in contact is known as __________.
normal forces
The force exerted by a spring is referred to as __________.
spring force
__________ is a type of contact force that opposes the relative motion of two surfaces in contact.
friction
Long Range Forces act over __________ distances.
great
Two examples of Long Range Forces are __________ and electromagnetic force.
gravity
The force of __________ pulls objects towards one another over a distance.
gravity
__________ is a force that acts between charged particles across distances.
Electromagnetic Force